/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:52:18,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:52:18,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:52:18,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 19:52:18,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 19:52:18,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 19:52:18,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 19:52:18,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 19:52:18,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 19:52:18,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 19:52:18,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 19:52:18,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 19:52:18,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:52:18,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:52:18,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:52:18,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:52:18,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:52:18,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:52:18,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:52:18,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:52:18,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:52:18,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:52:18,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:52:18,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:52:18,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 19:52:18,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 19:52:18,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 19:52:18,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 19:52:18,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 19:52:18,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 19:52:18,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 19:52:18,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 19:52:18,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 19:52:18,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:52:18,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:52:18,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:52:18,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:52:18,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:52:18,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:52:18,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:52:18,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:52:18,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:52:18,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:52:18,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:52:18,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:52:18,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:52:18,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:52:18,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:52:18,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:52:18,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:52:18,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:52:18,353 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:52:18,354 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:52:18,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-07-13 19:52:18,355 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-07-13 19:52:18,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:52:18,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:52:18,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:52:18,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:52:18,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:52:18,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:52:18,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:52:18,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:52:18,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:52:18,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... [2021-07-13 19:52:18,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:52:18,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:52:18,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:52:18,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:52:18,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:52:18,488 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:52:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:52:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:52:18,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:52:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:52:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:52:18,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:52:18,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:52:18,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:52:18,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:52:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:52:18,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:52:18,492 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:52:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:52:18,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:52:18,492 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-13 19:52:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-13 19:52:18,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-13 19:52:18,493 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-07-13 19:52:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-07-13 19:52:18,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-07-13 19:52:18,494 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:52:18,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:52:18,692 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-13 19:52:18,693 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 19:52:18,693 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-13 19:52:18,693 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-07-13 19:52:18,694 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-07-13 19:52:18,695 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:52:18 BoogieIcfgContainer [2021-07-13 19:52:18,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:52:18,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:52:18,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:52:18,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:52:18,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:52:18" (1/2) ... [2021-07-13 19:52:18,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d00e923 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:52:18, skipping insertion in model container [2021-07-13 19:52:18,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:52:18" (2/2) ... [2021-07-13 19:52:18,699 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-07-13 19:52:18,702 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:52:18,702 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:52:18,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:52:18,703 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:52:18,792 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-07-13 19:52:18,807 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 19:52:18,819 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:52:18,819 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:52:18,819 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:52:18,819 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:52:18,819 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:52:18,819 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:52:18,819 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:52:18,819 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork1======== [2021-07-13 19:52:18,826 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-07-13 19:52:18,842 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 120 states, 119 states have (on average 2.966386554621849) internal successors, (353), 119 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 119 states have (on average 2.966386554621849) internal successors, (353), 119 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,849 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:52:18,850 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork1 was SAFE (1/3) [2021-07-13 19:52:18,851 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 19:52:18,853 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:52:18,853 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:52:18,853 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:52:18,853 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:52:18,853 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:52:18,853 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:52:18,853 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:52:18,853 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork0======== [2021-07-13 19:52:18,854 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-07-13 19:52:18,859 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 101 states, 100 states have (on average 2.96) internal successors, (296), 100 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 100 states have (on average 2.96) internal successors, (296), 100 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:52:18,862 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE (2/3) [2021-07-13 19:52:18,862 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:52:18,864 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:52:18,864 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:52:18,864 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:52:18,864 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:52:18,864 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:52:18,864 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:52:18,864 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:52:18,864 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:52:18,865 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-07-13 19:52:18,878 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:18,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:18,883 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:18,884 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2039335680, now seen corresponding path program 1 times [2021-07-13 19:52:18,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:18,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948495956] [2021-07-13 19:52:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948495956] [2021-07-13 19:52:19,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948495956] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:19,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:19,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:52:19,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580909480] [2021-07-13 19:52:19,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:52:19,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:52:19,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:52:19,086 INFO L87 Difference]: Start difference. First operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,162 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-07-13 19:52:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:52:19,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,184 INFO L225 Difference]: With dead ends: 1089 [2021-07-13 19:52:19,184 INFO L226 Difference]: Without dead ends: 1068 [2021-07-13 19:52:19,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-07-13 19:52:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-07-13 19:52:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-07-13 19:52:19,260 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-07-13 19:52:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,261 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-07-13 19:52:19,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-07-13 19:52:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:52:19,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,264 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:52:19,264 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1643355036, now seen corresponding path program 2 times [2021-07-13 19:52:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899017158] [2021-07-13 19:52:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899017158] [2021-07-13 19:52:19,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899017158] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:19,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:19,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:52:19,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655037322] [2021-07-13 19:52:19,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:52:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:52:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:52:19,320 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,364 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-07-13 19:52:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:52:19,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:52:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,375 INFO L225 Difference]: With dead ends: 1218 [2021-07-13 19:52:19,375 INFO L226 Difference]: Without dead ends: 1197 [2021-07-13 19:52:19,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-13 19:52:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-07-13 19:52:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-07-13 19:52:19,421 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-07-13 19:52:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,421 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-07-13 19:52:19,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-07-13 19:52:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:19,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,423 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:52:19,424 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -661584511, now seen corresponding path program 1 times [2021-07-13 19:52:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162812540] [2021-07-13 19:52:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162812540] [2021-07-13 19:52:19,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162812540] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:19,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:19,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:52:19,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619467295] [2021-07-13 19:52:19,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:52:19,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:52:19,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:52:19,463 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,483 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-07-13 19:52:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:52:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,486 INFO L225 Difference]: With dead ends: 545 [2021-07-13 19:52:19,487 INFO L226 Difference]: Without dead ends: 529 [2021-07-13 19:52:19,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:52:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-13 19:52:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-07-13 19:52:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-07-13 19:52:19,498 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-07-13 19:52:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,498 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-07-13 19:52:19,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-07-13 19:52:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:19,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,500 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:52:19,500 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1055352097, now seen corresponding path program 1 times [2021-07-13 19:52:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206976577] [2021-07-13 19:52:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206976577] [2021-07-13 19:52:19,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206976577] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:19,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:19,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:19,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683090090] [2021-07-13 19:52:19,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:19,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:19,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:19,541 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,635 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-07-13 19:52:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:52:19,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,642 INFO L225 Difference]: With dead ends: 1358 [2021-07-13 19:52:19,642 INFO L226 Difference]: Without dead ends: 1346 [2021-07-13 19:52:19,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-07-13 19:52:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-07-13 19:52:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-07-13 19:52:19,664 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-07-13 19:52:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,664 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-07-13 19:52:19,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-07-13 19:52:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:19,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,666 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:52:19,666 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2074450649, now seen corresponding path program 1 times [2021-07-13 19:52:19,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820719972] [2021-07-13 19:52:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820719972] [2021-07-13 19:52:19,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820719972] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:19,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:19,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:52:19,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653803196] [2021-07-13 19:52:19,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:52:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:52:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:52:19,699 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,714 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-07-13 19:52:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:52:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,717 INFO L225 Difference]: With dead ends: 652 [2021-07-13 19:52:19,718 INFO L226 Difference]: Without dead ends: 604 [2021-07-13 19:52:19,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:52:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-13 19:52:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-07-13 19:52:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-07-13 19:52:19,730 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-07-13 19:52:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:19,730 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-07-13 19:52:19,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-07-13 19:52:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:19,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:19,732 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:19,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:52:19,732 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:19,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1944733407, now seen corresponding path program 1 times [2021-07-13 19:52:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017532590] [2021-07-13 19:52:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017532590] [2021-07-13 19:52:19,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017532590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808524475] [2021-07-13 19:52:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:52:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:19,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808524475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:19,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:52:19,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693529278] [2021-07-13 19:52:19,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:52:19,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:52:19,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:52:19,986 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,040 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-07-13 19:52:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:52:20,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,045 INFO L225 Difference]: With dead ends: 1057 [2021-07-13 19:52:20,045 INFO L226 Difference]: Without dead ends: 989 [2021-07-13 19:52:20,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-07-13 19:52:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-07-13 19:52:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-07-13 19:52:20,064 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-07-13 19:52:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,064 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-07-13 19:52:20,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-07-13 19:52:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:20,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,066 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-07-13 19:52:20,281 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-07-13 19:52:20,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:20,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612953740] [2021-07-13 19:52:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612953740] [2021-07-13 19:52:20,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612953740] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:20,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:20,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:20,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947862629] [2021-07-13 19:52:20,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:20,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:20,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:20,303 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,362 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-07-13 19:52:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:52:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,367 INFO L225 Difference]: With dead ends: 990 [2021-07-13 19:52:20,367 INFO L226 Difference]: Without dead ends: 963 [2021-07-13 19:52:20,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-07-13 19:52:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-07-13 19:52:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-07-13 19:52:20,383 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-07-13 19:52:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,383 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-07-13 19:52:20,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-07-13 19:52:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:20,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,396 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:20,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:52:20,396 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash -219308433, now seen corresponding path program 2 times [2021-07-13 19:52:20,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:20,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991024646] [2021-07-13 19:52:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991024646] [2021-07-13 19:52:20,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991024646] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:20,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:20,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:20,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489472578] [2021-07-13 19:52:20,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:20,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:20,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:20,435 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,484 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-07-13 19:52:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:52:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,489 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 19:52:20,489 INFO L226 Difference]: Without dead ends: 949 [2021-07-13 19:52:20,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:52:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-13 19:52:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-07-13 19:52:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-07-13 19:52:20,505 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-07-13 19:52:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,505 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-07-13 19:52:20,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-07-13 19:52:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:20,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,507 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:20,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:52:20,507 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1513578361, now seen corresponding path program 3 times [2021-07-13 19:52:20,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:20,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557987295] [2021-07-13 19:52:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557987295] [2021-07-13 19:52:20,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557987295] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:20,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:20,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893171177] [2021-07-13 19:52:20,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:20,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:20,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:20,544 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,609 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-07-13 19:52:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:52:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,613 INFO L225 Difference]: With dead ends: 847 [2021-07-13 19:52:20,613 INFO L226 Difference]: Without dead ends: 827 [2021-07-13 19:52:20,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-07-13 19:52:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-07-13 19:52:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-07-13 19:52:20,630 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-07-13 19:52:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,630 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-07-13 19:52:20,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-07-13 19:52:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:20,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,632 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:20,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:52:20,632 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 954675751, now seen corresponding path program 3 times [2021-07-13 19:52:20,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:20,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254403244] [2021-07-13 19:52:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254403244] [2021-07-13 19:52:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254403244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916418833] [2021-07-13 19:52:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:20,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:52:20,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:52:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:20,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916418833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:20,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:20,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:52:20,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150023466] [2021-07-13 19:52:20,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:52:20,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:20,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:52:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:52:20,811 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:20,864 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-07-13 19:52:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:52:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:20,868 INFO L225 Difference]: With dead ends: 857 [2021-07-13 19:52:20,868 INFO L226 Difference]: Without dead ends: 857 [2021-07-13 19:52:20,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-13 19:52:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-07-13 19:52:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-07-13 19:52:20,883 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-07-13 19:52:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,883 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-07-13 19:52:20,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-07-13 19:52:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:20,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,885 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:52:21,102 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1068078269, now seen corresponding path program 4 times [2021-07-13 19:52:21,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857886576] [2021-07-13 19:52:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857886576] [2021-07-13 19:52:21,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857886576] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:21,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:21,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:21,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962063946] [2021-07-13 19:52:21,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:21,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:21,129 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,189 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-07-13 19:52:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:52:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,193 INFO L225 Difference]: With dead ends: 866 [2021-07-13 19:52:21,194 INFO L226 Difference]: Without dead ends: 842 [2021-07-13 19:52:21,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-07-13 19:52:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-07-13 19:52:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-07-13 19:52:21,207 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-07-13 19:52:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,207 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-07-13 19:52:21,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-07-13 19:52:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:21,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,209 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 19:52:21,209 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1932007235, now seen corresponding path program 4 times [2021-07-13 19:52:21,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920491800] [2021-07-13 19:52:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920491800] [2021-07-13 19:52:21,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920491800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320157031] [2021-07-13 19:52:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:21,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:52:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320157031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:21,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:52:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972270491] [2021-07-13 19:52:21,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:52:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:52:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:52:21,335 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,392 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-07-13 19:52:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:52:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,396 INFO L225 Difference]: With dead ends: 825 [2021-07-13 19:52:21,396 INFO L226 Difference]: Without dead ends: 757 [2021-07-13 19:52:21,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-13 19:52:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-07-13 19:52:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-07-13 19:52:21,410 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-07-13 19:52:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,421 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-07-13 19:52:21,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-07-13 19:52:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:21,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,423 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 19:52:21,643 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-07-13 19:52:21,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114812486] [2021-07-13 19:52:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114812486] [2021-07-13 19:52:21,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114812486] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:21,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:21,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513561902] [2021-07-13 19:52:21,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:21,666 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,750 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-07-13 19:52:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:52:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,754 INFO L225 Difference]: With dead ends: 985 [2021-07-13 19:52:21,754 INFO L226 Difference]: Without dead ends: 946 [2021-07-13 19:52:21,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-13 19:52:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-07-13 19:52:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-07-13 19:52:21,768 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-07-13 19:52:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,768 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-07-13 19:52:21,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-07-13 19:52:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:21,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,770 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:52:21,770 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash -206582261, now seen corresponding path program 5 times [2021-07-13 19:52:21,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558999507] [2021-07-13 19:52:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558999507] [2021-07-13 19:52:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558999507] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:21,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:21,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:21,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701194806] [2021-07-13 19:52:21,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:21,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:21,787 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,832 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-07-13 19:52:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:52:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,836 INFO L225 Difference]: With dead ends: 783 [2021-07-13 19:52:21,836 INFO L226 Difference]: Without dead ends: 783 [2021-07-13 19:52:21,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:52:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-07-13 19:52:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-07-13 19:52:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-07-13 19:52:21,848 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-07-13 19:52:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,848 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-07-13 19:52:21,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-07-13 19:52:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:21,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,849 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:52:21,850 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-07-13 19:52:21,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556341171] [2021-07-13 19:52:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556341171] [2021-07-13 19:52:21,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556341171] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:21,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:21,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:21,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627702089] [2021-07-13 19:52:21,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:21,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:21,866 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,915 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-07-13 19:52:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:52:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,918 INFO L225 Difference]: With dead ends: 597 [2021-07-13 19:52:21,918 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:52:21,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:52:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-07-13 19:52:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-07-13 19:52:21,929 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-07-13 19:52:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-07-13 19:52:21,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-07-13 19:52:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:52:21,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:21,930 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-13 19:52:21,930 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1474843077, now seen corresponding path program 6 times [2021-07-13 19:52:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889899292] [2021-07-13 19:52:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:21,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889899292] [2021-07-13 19:52:21,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889899292] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:52:21,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:52:21,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:52:21,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630478628] [2021-07-13 19:52:21,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:52:21,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:52:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:52:21,949 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,989 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-07-13 19:52:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:52:21,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:52:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,992 INFO L225 Difference]: With dead ends: 595 [2021-07-13 19:52:21,992 INFO L226 Difference]: Without dead ends: 595 [2021-07-13 19:52:21,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:52:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-13 19:52:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-07-13 19:52:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-07-13 19:52:22,001 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-07-13 19:52:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:22,001 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-07-13 19:52:22,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-07-13 19:52:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:22,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:22,003 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:22,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-13 19:52:22,003 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1773823234, now seen corresponding path program 1 times [2021-07-13 19:52:22,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:22,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483043909] [2021-07-13 19:52:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:22,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:22,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483043909] [2021-07-13 19:52:22,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483043909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129872904] [2021-07-13 19:52:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:22,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:22,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:52:22,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:22,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:22,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:22,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129872904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:22,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:22,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870901921] [2021-07-13 19:52:22,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:22,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:22,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:22,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:22,398 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:22,766 INFO L93 Difference]: Finished difference Result 985 states and 3663 transitions. [2021-07-13 19:52:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:22,770 INFO L225 Difference]: With dead ends: 985 [2021-07-13 19:52:22,770 INFO L226 Difference]: Without dead ends: 904 [2021-07-13 19:52:22,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-13 19:52:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 559. [2021-07-13 19:52:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.6469534050179213) internal successors, (2035), 558 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 2035 transitions. [2021-07-13 19:52:22,785 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 2035 transitions. Word has length 26 [2021-07-13 19:52:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:22,785 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 2035 transitions. [2021-07-13 19:52:22,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 2035 transitions. [2021-07-13 19:52:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:22,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:22,787 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:23,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:23,001 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1216404668, now seen corresponding path program 1 times [2021-07-13 19:52:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26092267] [2021-07-13 19:52:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:23,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:23,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26092267] [2021-07-13 19:52:23,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26092267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434804397] [2021-07-13 19:52:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:23,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:23,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:52:23,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:23,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:23,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:23,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434804397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:23,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:23,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980670868] [2021-07-13 19:52:23,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:23,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:23,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:23,315 INFO L87 Difference]: Start difference. First operand 559 states and 2035 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:23,592 INFO L93 Difference]: Finished difference Result 985 states and 3680 transitions. [2021-07-13 19:52:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:23,595 INFO L225 Difference]: With dead ends: 985 [2021-07-13 19:52:23,596 INFO L226 Difference]: Without dead ends: 904 [2021-07-13 19:52:23,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-13 19:52:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 569. [2021-07-13 19:52:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-07-13 19:52:23,609 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-07-13 19:52:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:23,609 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-07-13 19:52:23,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-07-13 19:52:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:23,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:23,611 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:23,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:52:23,825 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1592934016, now seen corresponding path program 2 times [2021-07-13 19:52:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:23,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77529306] [2021-07-13 19:52:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:23,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77529306] [2021-07-13 19:52:23,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77529306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857884746] [2021-07-13 19:52:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:23,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:24,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:24,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:24,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:24,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:24,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:24,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857884746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:24,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:24,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169809816] [2021-07-13 19:52:24,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:24,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:24,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:24,203 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:25,328 INFO L93 Difference]: Finished difference Result 2058 states and 7632 transitions. [2021-07-13 19:52:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:52:25,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:25,333 INFO L225 Difference]: With dead ends: 2058 [2021-07-13 19:52:25,333 INFO L226 Difference]: Without dead ends: 1785 [2021-07-13 19:52:25,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 830.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-07-13 19:52:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 654. [2021-07-13 19:52:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.7304747320061256) internal successors, (2436), 653 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2436 transitions. [2021-07-13 19:52:25,351 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2436 transitions. Word has length 26 [2021-07-13 19:52:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:25,352 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 2436 transitions. [2021-07-13 19:52:25,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2436 transitions. [2021-07-13 19:52:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:25,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:25,353 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:25,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:25,571 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1149261336, now seen corresponding path program 3 times [2021-07-13 19:52:25,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:25,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106604240] [2021-07-13 19:52:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:25,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:25,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106604240] [2021-07-13 19:52:25,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106604240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039889772] [2021-07-13 19:52:25,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:25,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:52:25,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:25,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:25,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:25,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:25,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:25,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:25,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:25,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:25,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:25,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039889772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199459720] [2021-07-13 19:52:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:25,917 INFO L87 Difference]: Start difference. First operand 654 states and 2436 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:27,007 INFO L93 Difference]: Finished difference Result 2227 states and 8282 transitions. [2021-07-13 19:52:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:52:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:27,013 INFO L225 Difference]: With dead ends: 2227 [2021-07-13 19:52:27,013 INFO L226 Difference]: Without dead ends: 1955 [2021-07-13 19:52:27,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:52:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-07-13 19:52:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 695. [2021-07-13 19:52:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.80835734870317) internal successors, (2643), 694 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2643 transitions. [2021-07-13 19:52:27,032 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2643 transitions. Word has length 26 [2021-07-13 19:52:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:27,032 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2643 transitions. [2021-07-13 19:52:27,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2643 transitions. [2021-07-13 19:52:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:27,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:27,034 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:27,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:27,249 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -573555838, now seen corresponding path program 2 times [2021-07-13 19:52:27,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:27,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288293697] [2021-07-13 19:52:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:27,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288293697] [2021-07-13 19:52:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288293697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195618658] [2021-07-13 19:52:27,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:27,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:27,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:27,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:27,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:27,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:27,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:27,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:27,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:27,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195618658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:27,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:27,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:27,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689860036] [2021-07-13 19:52:27,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:27,549 INFO L87 Difference]: Start difference. First operand 695 states and 2643 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:28,489 INFO L93 Difference]: Finished difference Result 1519 states and 5838 transitions. [2021-07-13 19:52:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:52:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:28,493 INFO L225 Difference]: With dead ends: 1519 [2021-07-13 19:52:28,494 INFO L226 Difference]: Without dead ends: 1446 [2021-07-13 19:52:28,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 670.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:52:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-07-13 19:52:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 706. [2021-07-13 19:52:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.819858156028369) internal successors, (2693), 705 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2693 transitions. [2021-07-13 19:52:28,515 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2693 transitions. Word has length 26 [2021-07-13 19:52:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:28,515 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2693 transitions. [2021-07-13 19:52:28,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2693 transitions. [2021-07-13 19:52:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:28,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:28,516 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:28,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:52:28,734 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142914, now seen corresponding path program 3 times [2021-07-13 19:52:28,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:28,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162204028] [2021-07-13 19:52:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:28,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162204028] [2021-07-13 19:52:28,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162204028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498225394] [2021-07-13 19:52:28,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:28,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:28,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:28,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:28,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:28,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:28,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:28,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:28,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498225394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:29,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:29,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:29,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288530085] [2021-07-13 19:52:29,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:29,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:29,018 INFO L87 Difference]: Start difference. First operand 706 states and 2693 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:30,145 INFO L93 Difference]: Finished difference Result 1567 states and 6047 transitions. [2021-07-13 19:52:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:52:30,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:30,149 INFO L225 Difference]: With dead ends: 1567 [2021-07-13 19:52:30,149 INFO L226 Difference]: Without dead ends: 1484 [2021-07-13 19:52:30,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 797.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:52:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-07-13 19:52:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 704. [2021-07-13 19:52:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-07-13 19:52:30,165 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-07-13 19:52:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:30,165 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-07-13 19:52:30,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-07-13 19:52:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:30,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:30,166 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:30,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:30,383 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash 840343866, now seen corresponding path program 1 times [2021-07-13 19:52:30,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:30,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170984097] [2021-07-13 19:52:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:30,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:30,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170984097] [2021-07-13 19:52:30,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170984097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154335347] [2021-07-13 19:52:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:30,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:30,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:30,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:30,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:30,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154335347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:30,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:30,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312796638] [2021-07-13 19:52:30,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:30,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:30,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:30,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:30,626 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:30,803 INFO L93 Difference]: Finished difference Result 1121 states and 4306 transitions. [2021-07-13 19:52:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:30,806 INFO L225 Difference]: With dead ends: 1121 [2021-07-13 19:52:30,806 INFO L226 Difference]: Without dead ends: 1039 [2021-07-13 19:52:30,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-13 19:52:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 733. [2021-07-13 19:52:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.8278688524590163) internal successors, (2802), 732 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2802 transitions. [2021-07-13 19:52:30,820 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2802 transitions. Word has length 26 [2021-07-13 19:52:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:30,820 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2802 transitions. [2021-07-13 19:52:30,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2802 transitions. [2021-07-13 19:52:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:30,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:30,821 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:52:31,041 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash -235916034, now seen corresponding path program 2 times [2021-07-13 19:52:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933857494] [2021-07-13 19:52:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:31,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:31,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933857494] [2021-07-13 19:52:31,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933857494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:31,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307494541] [2021-07-13 19:52:31,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:31,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:31,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:31,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:31,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:31,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:31,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:31,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-13 19:52:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:31,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307494541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:31,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:31,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:52:31,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470366413] [2021-07-13 19:52:31,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:31,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:31,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:31,328 INFO L87 Difference]: Start difference. First operand 733 states and 2802 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:31,968 INFO L93 Difference]: Finished difference Result 1208 states and 4645 transitions. [2021-07-13 19:52:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:52:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:31,971 INFO L225 Difference]: With dead ends: 1208 [2021-07-13 19:52:31,971 INFO L226 Difference]: Without dead ends: 1135 [2021-07-13 19:52:31,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-07-13 19:52:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 731. [2021-07-13 19:52:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.828767123287671) internal successors, (2795), 730 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2795 transitions. [2021-07-13 19:52:31,984 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2795 transitions. Word has length 26 [2021-07-13 19:52:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:31,985 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2795 transitions. [2021-07-13 19:52:31,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2795 transitions. [2021-07-13 19:52:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:31,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:31,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:32,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:52:32,201 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 1 times [2021-07-13 19:52:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632883160] [2021-07-13 19:52:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:32,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:32,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632883160] [2021-07-13 19:52:32,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632883160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34980915] [2021-07-13 19:52:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:32,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:32,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:32,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:32,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:32,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34980915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:32,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:32,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226623151] [2021-07-13 19:52:32,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:32,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:32,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:32,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:32,458 INFO L87 Difference]: Start difference. First operand 731 states and 2795 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:32,691 INFO L93 Difference]: Finished difference Result 1082 states and 4150 transitions. [2021-07-13 19:52:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:32,694 INFO L225 Difference]: With dead ends: 1082 [2021-07-13 19:52:32,694 INFO L226 Difference]: Without dead ends: 1009 [2021-07-13 19:52:32,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-07-13 19:52:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 740. [2021-07-13 19:52:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.8335588633288227) internal successors, (2833), 739 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2833 transitions. [2021-07-13 19:52:32,706 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2833 transitions. Word has length 26 [2021-07-13 19:52:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:32,707 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2833 transitions. [2021-07-13 19:52:32,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2833 transitions. [2021-07-13 19:52:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:32,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:32,708 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:32,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:32,921 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:32,921 INFO L82 PathProgramCache]: Analyzing trace with hash -773558878, now seen corresponding path program 2 times [2021-07-13 19:52:32,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:32,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89568543] [2021-07-13 19:52:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:33,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:33,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89568543] [2021-07-13 19:52:33,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89568543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039420485] [2021-07-13 19:52:33,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:33,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:33,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:33,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:33,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:33,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:33,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:33,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:33,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:33,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-13 19:52:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039420485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:33,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:52:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743143714] [2021-07-13 19:52:33,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:33,289 INFO L87 Difference]: Start difference. First operand 740 states and 2833 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:33,860 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-07-13 19:52:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:52:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:33,862 INFO L225 Difference]: With dead ends: 1158 [2021-07-13 19:52:33,862 INFO L226 Difference]: Without dead ends: 1083 [2021-07-13 19:52:33,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-07-13 19:52:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 736. [2021-07-13 19:52:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-07-13 19:52:33,875 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-07-13 19:52:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:33,875 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-07-13 19:52:33,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-07-13 19:52:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:33,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:33,877 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:34,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 19:52:34,093 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1105227200, now seen corresponding path program 3 times [2021-07-13 19:52:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:34,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686640439] [2021-07-13 19:52:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:34,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:34,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686640439] [2021-07-13 19:52:34,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686640439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474663108] [2021-07-13 19:52:34,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:34,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:34,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 19:52:34,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:34,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:34,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:34,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-07-13 19:52:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:34,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474663108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:34,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:52:34,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429498361] [2021-07-13 19:52:34,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:34,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:34,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:34,444 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:35,003 INFO L93 Difference]: Finished difference Result 1194 states and 4592 transitions. [2021-07-13 19:52:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:52:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:35,006 INFO L225 Difference]: With dead ends: 1194 [2021-07-13 19:52:35,006 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:52:35,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:52:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:52:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 760. [2021-07-13 19:52:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.8194993412384717) internal successors, (2899), 759 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2899 transitions. [2021-07-13 19:52:35,019 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2899 transitions. Word has length 26 [2021-07-13 19:52:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:35,019 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2899 transitions. [2021-07-13 19:52:35,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2899 transitions. [2021-07-13 19:52:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:35,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:35,021 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:35,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:35,231 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1970882652, now seen corresponding path program 3 times [2021-07-13 19:52:35,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:35,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914926391] [2021-07-13 19:52:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:35,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:35,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914926391] [2021-07-13 19:52:35,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914926391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103815411] [2021-07-13 19:52:35,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:35,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:52:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:35,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:35,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:35,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 19:52:35,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:35,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:35,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:35,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-07-13 19:52:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103815411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:35,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:52:35,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984689260] [2021-07-13 19:52:35,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:52:35,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:35,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:52:35,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:52:35,573 INFO L87 Difference]: Start difference. First operand 760 states and 2899 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:36,149 INFO L93 Difference]: Finished difference Result 1244 states and 4764 transitions. [2021-07-13 19:52:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:52:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:36,151 INFO L225 Difference]: With dead ends: 1244 [2021-07-13 19:52:36,151 INFO L226 Difference]: Without dead ends: 1173 [2021-07-13 19:52:36,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-13 19:52:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 736. [2021-07-13 19:52:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-07-13 19:52:36,164 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-07-13 19:52:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:36,164 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-07-13 19:52:36,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-07-13 19:52:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:36,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:36,166 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:36,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 19:52:36,376 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:36,377 INFO L82 PathProgramCache]: Analyzing trace with hash 197192494, now seen corresponding path program 4 times [2021-07-13 19:52:36,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:36,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974268311] [2021-07-13 19:52:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:36,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974268311] [2021-07-13 19:52:36,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974268311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224383936] [2021-07-13 19:52:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:36,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:36,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:36,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:36,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:36,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:36,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:52:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:36,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224383936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:36,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:36,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:36,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465901930] [2021-07-13 19:52:36,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:36,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:36,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:36,599 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:36,932 INFO L93 Difference]: Finished difference Result 1414 states and 5349 transitions. [2021-07-13 19:52:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:36,936 INFO L225 Difference]: With dead ends: 1414 [2021-07-13 19:52:36,936 INFO L226 Difference]: Without dead ends: 1323 [2021-07-13 19:52:36,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-07-13 19:52:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 814. [2021-07-13 19:52:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-07-13 19:52:36,951 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-07-13 19:52:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:36,951 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-07-13 19:52:36,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-07-13 19:52:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:36,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:36,953 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:37,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:52:37,161 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1571037912, now seen corresponding path program 4 times [2021-07-13 19:52:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:37,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578185887] [2021-07-13 19:52:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:37,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:37,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578185887] [2021-07-13 19:52:37,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578185887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336100520] [2021-07-13 19:52:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:37,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:37,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:37,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:37,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:52:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:37,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336100520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:37,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:37,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030224892] [2021-07-13 19:52:37,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:37,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:37,377 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:37,612 INFO L93 Difference]: Finished difference Result 1224 states and 4746 transitions. [2021-07-13 19:52:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:37,615 INFO L225 Difference]: With dead ends: 1224 [2021-07-13 19:52:37,615 INFO L226 Difference]: Without dead ends: 1142 [2021-07-13 19:52:37,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-13 19:52:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 814. [2021-07-13 19:52:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-07-13 19:52:37,628 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-07-13 19:52:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:37,628 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-07-13 19:52:37,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-07-13 19:52:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:37,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:37,630 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:37,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:52:37,831 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash 112793720, now seen corresponding path program 5 times [2021-07-13 19:52:37,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:37,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591863432] [2021-07-13 19:52:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:37,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591863432] [2021-07-13 19:52:37,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591863432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251882585] [2021-07-13 19:52:37,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:52:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:37,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:37,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:37,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:38,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:38,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:38,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:38,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251882585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:38,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:38,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:38,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960643147] [2021-07-13 19:52:38,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:38,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:38,048 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:38,303 INFO L93 Difference]: Finished difference Result 1332 states and 5142 transitions. [2021-07-13 19:52:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:38,306 INFO L225 Difference]: With dead ends: 1332 [2021-07-13 19:52:38,306 INFO L226 Difference]: Without dead ends: 1241 [2021-07-13 19:52:38,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-07-13 19:52:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 832. [2021-07-13 19:52:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.931407942238267) internal successors, (3267), 831 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 3267 transitions. [2021-07-13 19:52:38,320 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 3267 transitions. Word has length 26 [2021-07-13 19:52:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:38,320 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 3267 transitions. [2021-07-13 19:52:38,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 3267 transitions. [2021-07-13 19:52:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:38,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:38,322 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:38,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 19:52:38,525 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1004083728, now seen corresponding path program 6 times [2021-07-13 19:52:38,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:38,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095828226] [2021-07-13 19:52:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:38,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095828226] [2021-07-13 19:52:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095828226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139151069] [2021-07-13 19:52:38,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:38,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:38,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:38,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:38,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:38,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:38,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:38,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-13 19:52:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:38,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139151069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:38,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:38,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:52:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143137451] [2021-07-13 19:52:38,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:52:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:52:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:52:38,809 INFO L87 Difference]: Start difference. First operand 832 states and 3267 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:39,684 INFO L93 Difference]: Finished difference Result 1857 states and 7226 transitions. [2021-07-13 19:52:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:52:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:39,689 INFO L225 Difference]: With dead ends: 1857 [2021-07-13 19:52:39,689 INFO L226 Difference]: Without dead ends: 1694 [2021-07-13 19:52:39,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:52:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-07-13 19:52:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 856. [2021-07-13 19:52:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-07-13 19:52:39,706 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-07-13 19:52:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:39,706 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-07-13 19:52:39,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-07-13 19:52:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:39,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:39,708 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:39,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:39,909 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1269539716, now seen corresponding path program 5 times [2021-07-13 19:52:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:39,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696640915] [2021-07-13 19:52:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:39,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:39,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696640915] [2021-07-13 19:52:39,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696640915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280585939] [2021-07-13 19:52:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:40,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:40,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:40,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:40,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:40,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:40,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280585939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:40,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:40,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666398583] [2021-07-13 19:52:40,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:40,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:40,115 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:40,324 INFO L93 Difference]: Finished difference Result 1245 states and 4901 transitions. [2021-07-13 19:52:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:40,326 INFO L225 Difference]: With dead ends: 1245 [2021-07-13 19:52:40,326 INFO L226 Difference]: Without dead ends: 1163 [2021-07-13 19:52:40,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-13 19:52:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 865. [2021-07-13 19:52:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.9756944444444446) internal successors, (3435), 864 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3435 transitions. [2021-07-13 19:52:40,341 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3435 transitions. Word has length 26 [2021-07-13 19:52:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:40,341 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 3435 transitions. [2021-07-13 19:52:40,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3435 transitions. [2021-07-13 19:52:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:40,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:40,343 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:40,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 19:52:40,558 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1287685744, now seen corresponding path program 6 times [2021-07-13 19:52:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:40,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659152647] [2021-07-13 19:52:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:40,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:40,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659152647] [2021-07-13 19:52:40,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659152647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:40,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227167717] [2021-07-13 19:52:40,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:40,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:52:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:40,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:40,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:40,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:40,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:40,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:40,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-13 19:52:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:40,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227167717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:40,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:40,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:52:40,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106487616] [2021-07-13 19:52:40,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:52:40,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:52:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:52:40,813 INFO L87 Difference]: Start difference. First operand 865 states and 3435 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:41,926 INFO L93 Difference]: Finished difference Result 1646 states and 6434 transitions. [2021-07-13 19:52:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:52:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:41,930 INFO L225 Difference]: With dead ends: 1646 [2021-07-13 19:52:41,930 INFO L226 Difference]: Without dead ends: 1573 [2021-07-13 19:52:41,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 783.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:52:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-07-13 19:52:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 856. [2021-07-13 19:52:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-07-13 19:52:41,946 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-07-13 19:52:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:41,946 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-07-13 19:52:41,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-07-13 19:52:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:41,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:41,948 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:42,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:52:42,151 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-07-13 19:52:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:42,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712000201] [2021-07-13 19:52:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712000201] [2021-07-13 19:52:42,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712000201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420859187] [2021-07-13 19:52:42,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:42,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:42,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:42,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:42,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:52:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420859187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:42,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759768803] [2021-07-13 19:52:42,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:42,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:42,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:42,346 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:42,543 INFO L93 Difference]: Finished difference Result 1278 states and 4997 transitions. [2021-07-13 19:52:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:42,546 INFO L225 Difference]: With dead ends: 1278 [2021-07-13 19:52:42,546 INFO L226 Difference]: Without dead ends: 1205 [2021-07-13 19:52:42,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-07-13 19:52:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 892. [2021-07-13 19:52:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.9551066217732886) internal successors, (3524), 891 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3524 transitions. [2021-07-13 19:52:42,561 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3524 transitions. Word has length 26 [2021-07-13 19:52:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:42,561 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3524 transitions. [2021-07-13 19:52:42,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3524 transitions. [2021-07-13 19:52:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:42,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:42,563 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:42,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,777 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -63771734, now seen corresponding path program 4 times [2021-07-13 19:52:42,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:42,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279339999] [2021-07-13 19:52:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:42,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:42,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279339999] [2021-07-13 19:52:42,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279339999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:42,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118939954] [2021-07-13 19:52:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:42,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:42,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:42,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:42,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:42,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:42,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:52:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118939954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:43,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:43,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738386295] [2021-07-13 19:52:43,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:43,002 INFO L87 Difference]: Start difference. First operand 892 states and 3524 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:43,245 INFO L93 Difference]: Finished difference Result 1234 states and 4842 transitions. [2021-07-13 19:52:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:43,247 INFO L225 Difference]: With dead ends: 1234 [2021-07-13 19:52:43,247 INFO L226 Difference]: Without dead ends: 1161 [2021-07-13 19:52:43,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-13 19:52:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-07-13 19:52:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-07-13 19:52:43,262 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-07-13 19:52:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:43,262 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-07-13 19:52:43,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-07-13 19:52:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:43,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:43,263 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:43,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:52:43,464 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-07-13 19:52:43,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:43,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531952477] [2021-07-13 19:52:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531952477] [2021-07-13 19:52:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531952477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780044484] [2021-07-13 19:52:43,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:43,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:43,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:43,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:43,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:43,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:43,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:43,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:43,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:43,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:43,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780044484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:43,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:43,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262972571] [2021-07-13 19:52:43,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:43,663 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:43,909 INFO L93 Difference]: Finished difference Result 1243 states and 4884 transitions. [2021-07-13 19:52:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:43,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:43,912 INFO L225 Difference]: With dead ends: 1243 [2021-07-13 19:52:43,912 INFO L226 Difference]: Without dead ends: 1170 [2021-07-13 19:52:43,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-13 19:52:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 877. [2021-07-13 19:52:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-07-13 19:52:43,926 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-07-13 19:52:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:43,926 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-07-13 19:52:43,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-07-13 19:52:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:43,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:43,928 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:44,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:44,135 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-07-13 19:52:44,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:44,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733549544] [2021-07-13 19:52:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:44,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733549544] [2021-07-13 19:52:44,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733549544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992063404] [2021-07-13 19:52:44,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:44,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:52:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:44,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:44,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:44,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:44,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:44,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:44,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992063404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:44,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:44,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:44,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530725860] [2021-07-13 19:52:44,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:44,414 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:45,141 INFO L93 Difference]: Finished difference Result 1415 states and 5519 transitions. [2021-07-13 19:52:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:45,144 INFO L225 Difference]: With dead ends: 1415 [2021-07-13 19:52:45,144 INFO L226 Difference]: Without dead ends: 1332 [2021-07-13 19:52:45,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:52:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-13 19:52:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 868. [2021-07-13 19:52:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-07-13 19:52:45,158 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-07-13 19:52:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:45,158 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-07-13 19:52:45,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-07-13 19:52:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:45,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:45,160 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:45,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:52:45,373 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 642756650, now seen corresponding path program 5 times [2021-07-13 19:52:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:45,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551603419] [2021-07-13 19:52:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:45,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:45,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551603419] [2021-07-13 19:52:45,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551603419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:45,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160264645] [2021-07-13 19:52:45,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:45,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:45,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:45,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:45,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:45,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:45,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:45,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:45,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:45,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160264645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:45,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:45,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:45,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85809008] [2021-07-13 19:52:45,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:45,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:45,570 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:45,789 INFO L93 Difference]: Finished difference Result 1197 states and 4721 transitions. [2021-07-13 19:52:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:45,792 INFO L225 Difference]: With dead ends: 1197 [2021-07-13 19:52:45,792 INFO L226 Difference]: Without dead ends: 1124 [2021-07-13 19:52:45,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-07-13 19:52:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 877. [2021-07-13 19:52:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.982876712328767) internal successors, (3489), 876 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3489 transitions. [2021-07-13 19:52:45,805 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3489 transitions. Word has length 26 [2021-07-13 19:52:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:45,805 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3489 transitions. [2021-07-13 19:52:45,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3489 transitions. [2021-07-13 19:52:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:45,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:45,807 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:46,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:46,008 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1470280500, now seen corresponding path program 6 times [2021-07-13 19:52:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:46,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463073818] [2021-07-13 19:52:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:46,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:46,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463073818] [2021-07-13 19:52:46,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463073818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:46,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242646444] [2021-07-13 19:52:46,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:46,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:52:46,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:46,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:46,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:46,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:46,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:46,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:46,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:46,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:46,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242646444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:46,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:46,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265961009] [2021-07-13 19:52:46,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:46,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:46,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:46,284 INFO L87 Difference]: Start difference. First operand 877 states and 3489 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:46,995 INFO L93 Difference]: Finished difference Result 1349 states and 5259 transitions. [2021-07-13 19:52:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:46,997 INFO L225 Difference]: With dead ends: 1349 [2021-07-13 19:52:46,997 INFO L226 Difference]: Without dead ends: 1274 [2021-07-13 19:52:46,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:52:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-07-13 19:52:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 868. [2021-07-13 19:52:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-07-13 19:52:47,012 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-07-13 19:52:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:47,012 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-07-13 19:52:47,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-07-13 19:52:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:47,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:47,014 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:47,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 19:52:47,229 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 672248968, now seen corresponding path program 7 times [2021-07-13 19:52:47,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:47,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820580648] [2021-07-13 19:52:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:47,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:47,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820580648] [2021-07-13 19:52:47,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820580648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188329724] [2021-07-13 19:52:47,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:47,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:47,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:52:47,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:47,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:47,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:47,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:47,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188329724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:47,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:47,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420181935] [2021-07-13 19:52:47,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:47,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:47,478 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:47,759 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-07-13 19:52:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:47,762 INFO L225 Difference]: With dead ends: 1481 [2021-07-13 19:52:47,762 INFO L226 Difference]: Without dead ends: 1400 [2021-07-13 19:52:47,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-13 19:52:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 910. [2021-07-13 19:52:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-07-13 19:52:47,776 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-07-13 19:52:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:47,777 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-07-13 19:52:47,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-07-13 19:52:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:47,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:47,778 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:47,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:47,979 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1976988362, now seen corresponding path program 7 times [2021-07-13 19:52:47,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:47,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495668004] [2021-07-13 19:52:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:48,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495668004] [2021-07-13 19:52:48,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495668004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856515467] [2021-07-13 19:52:48,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:48,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:48,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:52:48,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:48,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:48,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856515467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:48,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:48,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494923153] [2021-07-13 19:52:48,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:48,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:48,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:48,242 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:48,575 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-07-13 19:52:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:48,578 INFO L225 Difference]: With dead ends: 1431 [2021-07-13 19:52:48,578 INFO L226 Difference]: Without dead ends: 1350 [2021-07-13 19:52:48,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-13 19:52:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 880. [2021-07-13 19:52:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-07-13 19:52:48,593 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-07-13 19:52:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:48,593 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-07-13 19:52:48,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-07-13 19:52:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:48,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:48,594 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:48,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:52:48,795 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash 491359750, now seen corresponding path program 8 times [2021-07-13 19:52:48,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:48,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903348935] [2021-07-13 19:52:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:48,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:48,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903348935] [2021-07-13 19:52:48,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903348935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:48,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125304403] [2021-07-13 19:52:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:48,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:48,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:48,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:48,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:48,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:48,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:49,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:49,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:49,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:49,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125304403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:49,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:49,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:52:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039940177] [2021-07-13 19:52:49,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:52:49,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:52:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:49,121 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:50,329 INFO L93 Difference]: Finished difference Result 2510 states and 9509 transitions. [2021-07-13 19:52:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:52:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:50,333 INFO L225 Difference]: With dead ends: 2510 [2021-07-13 19:52:50,334 INFO L226 Difference]: Without dead ends: 2237 [2021-07-13 19:52:50,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 869.8ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:52:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-07-13 19:52:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 886. [2021-07-13 19:52:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-07-13 19:52:50,352 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-07-13 19:52:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:50,352 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-07-13 19:52:50,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-07-13 19:52:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:50,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:50,354 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:50,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:50,555 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2044131694, now seen corresponding path program 9 times [2021-07-13 19:52:50,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:50,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610957181] [2021-07-13 19:52:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:50,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610957181] [2021-07-13 19:52:50,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610957181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721593694] [2021-07-13 19:52:50,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:50,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:52:50,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:50,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:50,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:50,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:50,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:50,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:50,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:50,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721593694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:50,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:52:50,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910309563] [2021-07-13 19:52:50,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:52:50,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:52:50,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:50,875 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:52,035 INFO L93 Difference]: Finished difference Result 2599 states and 9825 transitions. [2021-07-13 19:52:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:52:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:52,040 INFO L225 Difference]: With dead ends: 2599 [2021-07-13 19:52:52,040 INFO L226 Difference]: Without dead ends: 2327 [2021-07-13 19:52:52,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:52:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-07-13 19:52:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 880. [2021-07-13 19:52:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-07-13 19:52:52,060 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-07-13 19:52:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:52,060 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-07-13 19:52:52,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-07-13 19:52:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:52,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:52,061 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:52,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:52:52,262 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1675130104, now seen corresponding path program 8 times [2021-07-13 19:52:52,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:52,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266109361] [2021-07-13 19:52:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266109361] [2021-07-13 19:52:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266109361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712906985] [2021-07-13 19:52:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:52,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:52,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:52,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:52,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:52,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:52,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:52,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:52,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:52,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712906985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:52,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:52,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429497454] [2021-07-13 19:52:52,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:52,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:52,525 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:53,530 INFO L93 Difference]: Finished difference Result 1683 states and 6604 transitions. [2021-07-13 19:52:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:52:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:53,533 INFO L225 Difference]: With dead ends: 1683 [2021-07-13 19:52:53,533 INFO L226 Difference]: Without dead ends: 1610 [2021-07-13 19:52:53,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:52:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-07-13 19:52:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 889. [2021-07-13 19:52:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-07-13 19:52:53,549 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-07-13 19:52:53,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:53,549 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-07-13 19:52:53,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-07-13 19:52:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:53,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:53,550 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:53,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 19:52:53,751 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1224250116, now seen corresponding path program 9 times [2021-07-13 19:52:53,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:53,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458834527] [2021-07-13 19:52:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:53,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:53,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458834527] [2021-07-13 19:52:53,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458834527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:53,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464453736] [2021-07-13 19:52:53,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:53,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:52:53,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:53,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:52:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:53,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:53,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:53,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:53,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:53,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:52:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:54,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464453736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:54,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:54,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:52:54,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568875247] [2021-07-13 19:52:54,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:54,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:54,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:54,020 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:55,052 INFO L93 Difference]: Finished difference Result 1683 states and 6635 transitions. [2021-07-13 19:52:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:52:55,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:55,056 INFO L225 Difference]: With dead ends: 1683 [2021-07-13 19:52:55,056 INFO L226 Difference]: Without dead ends: 1600 [2021-07-13 19:52:55,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 749.6ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:52:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-07-13 19:52:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 871. [2021-07-13 19:52:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-07-13 19:52:55,073 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-07-13 19:52:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:55,073 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-07-13 19:52:55,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-07-13 19:52:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:55,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:55,075 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:55,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:55,275 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash 795267296, now seen corresponding path program 10 times [2021-07-13 19:52:55,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:55,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402400372] [2021-07-13 19:52:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:55,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:55,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402400372] [2021-07-13 19:52:55,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402400372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:55,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882162821] [2021-07-13 19:52:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:55,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:55,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:55,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:52:55,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:55,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:55,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:55,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882162821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:55,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:55,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:55,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986387702] [2021-07-13 19:52:55,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:55,504 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:56,010 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-07-13 19:52:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:56,014 INFO L225 Difference]: With dead ends: 2026 [2021-07-13 19:52:56,014 INFO L226 Difference]: Without dead ends: 1945 [2021-07-13 19:52:56,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-13 19:52:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 911. [2021-07-13 19:52:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-07-13 19:52:56,031 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-07-13 19:52:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:56,031 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-07-13 19:52:56,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-07-13 19:52:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:56,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:56,033 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:56,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 19:52:56,233 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2100006690, now seen corresponding path program 10 times [2021-07-13 19:52:56,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:56,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238808361] [2021-07-13 19:52:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:56,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:56,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238808361] [2021-07-13 19:52:56,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238808361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474520907] [2021-07-13 19:52:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:56,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:56,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:56,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:56,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:56,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:52:56,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:56,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:56,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:52:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:56,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474520907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:56,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:52:56,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106935488] [2021-07-13 19:52:56,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:56,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:56,461 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:56,887 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-07-13 19:52:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:56,891 INFO L225 Difference]: With dead ends: 1975 [2021-07-13 19:52:56,891 INFO L226 Difference]: Without dead ends: 1894 [2021-07-13 19:52:56,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-13 19:52:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 881. [2021-07-13 19:52:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-07-13 19:52:56,908 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-07-13 19:52:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:56,908 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-07-13 19:52:56,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-07-13 19:52:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:56,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:56,910 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:57,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,110 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:57,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1358277036, now seen corresponding path program 7 times [2021-07-13 19:52:57,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:57,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617344423] [2021-07-13 19:52:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617344423] [2021-07-13 19:52:57,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617344423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162629382] [2021-07-13 19:52:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:57,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:57,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:57,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:57,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:57,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:57,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:57,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162629382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:57,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:57,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824874771] [2021-07-13 19:52:57,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:57,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:57,318 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:57,586 INFO L93 Difference]: Finished difference Result 1399 states and 5520 transitions. [2021-07-13 19:52:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:57,588 INFO L225 Difference]: With dead ends: 1399 [2021-07-13 19:52:57,588 INFO L226 Difference]: Without dead ends: 1317 [2021-07-13 19:52:57,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-07-13 19:52:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 902. [2021-07-13 19:52:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-07-13 19:52:57,602 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-07-13 19:52:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:57,603 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-07-13 19:52:57,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-07-13 19:52:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:57,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:57,604 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:57,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 19:52:57,809 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:57,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1860430360, now seen corresponding path program 8 times [2021-07-13 19:52:57,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:57,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12323855] [2021-07-13 19:52:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:57,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:57,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12323855] [2021-07-13 19:52:57,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12323855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:57,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696422497] [2021-07-13 19:52:57,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:57,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:52:57,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:52:57,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:58,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:58,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-13 19:52:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:58,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696422497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:58,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:58,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:52:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216384999] [2021-07-13 19:52:58,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:52:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:52:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:58,107 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:58,796 INFO L93 Difference]: Finished difference Result 1442 states and 5673 transitions. [2021-07-13 19:52:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:52:58,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:58,799 INFO L225 Difference]: With dead ends: 1442 [2021-07-13 19:52:58,799 INFO L226 Difference]: Without dead ends: 1369 [2021-07-13 19:52:58,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:52:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-13 19:52:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 893. [2021-07-13 19:52:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-07-13 19:52:58,824 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-07-13 19:52:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:58,825 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-07-13 19:52:58,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-07-13 19:52:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:58,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:58,826 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:59,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:52:59,037 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 7 times [2021-07-13 19:52:59,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:59,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693231868] [2021-07-13 19:52:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693231868] [2021-07-13 19:52:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693231868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004300546] [2021-07-13 19:52:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:59,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:59,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:59,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004300546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:59,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229780913] [2021-07-13 19:52:59,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:59,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:59,255 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:59,535 INFO L93 Difference]: Finished difference Result 1337 states and 5270 transitions. [2021-07-13 19:52:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:59,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:52:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:59,538 INFO L225 Difference]: With dead ends: 1337 [2021-07-13 19:52:59,538 INFO L226 Difference]: Without dead ends: 1264 [2021-07-13 19:52:59,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:52:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-13 19:52:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 902. [2021-07-13 19:52:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-07-13 19:52:59,552 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-07-13 19:52:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:59,552 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-07-13 19:52:59,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-07-13 19:52:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:52:59,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:59,554 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:59,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,763 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:59,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1322787516, now seen corresponding path program 8 times [2021-07-13 19:52:59,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:59,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786015846] [2021-07-13 19:52:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:59,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:59,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786015846] [2021-07-13 19:52:59,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786015846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649022894] [2021-07-13 19:52:59,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:59,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:59,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:52:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:59,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:52:59,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:52:59,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:52:59,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:52:59,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:52:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:59,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649022894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:59,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:59,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:52:59,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365188074] [2021-07-13 19:52:59,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:59,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:59,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:59,972 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:00,227 INFO L93 Difference]: Finished difference Result 1333 states and 5253 transitions. [2021-07-13 19:53:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:00,230 INFO L225 Difference]: With dead ends: 1333 [2021-07-13 19:53:00,230 INFO L226 Difference]: Without dead ends: 1258 [2021-07-13 19:53:00,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-07-13 19:53:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 893. [2021-07-13 19:53:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-07-13 19:53:00,244 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-07-13 19:53:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:00,244 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-07-13 19:53:00,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-07-13 19:53:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:00,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:00,245 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:00,446 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1093393702, now seen corresponding path program 9 times [2021-07-13 19:53:00,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:00,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103424720] [2021-07-13 19:53:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:00,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:00,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103424720] [2021-07-13 19:53:00,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103424720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069855660] [2021-07-13 19:53:00,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:00,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:00,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:00,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:00,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:00,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:00,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:00,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:00,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:00,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069855660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:00,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:00,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826209219] [2021-07-13 19:53:00,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:00,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:00,662 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:00,940 INFO L93 Difference]: Finished difference Result 1359 states and 5336 transitions. [2021-07-13 19:53:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:00,943 INFO L225 Difference]: With dead ends: 1359 [2021-07-13 19:53:00,943 INFO L226 Difference]: Without dead ends: 1288 [2021-07-13 19:53:00,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-13 19:53:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 917. [2021-07-13 19:53:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-07-13 19:53:00,957 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-07-13 19:53:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:00,957 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-07-13 19:53:00,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-07-13 19:53:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:00,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:00,959 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:01,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:01,160 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash -227738250, now seen corresponding path program 9 times [2021-07-13 19:53:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:01,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766894727] [2021-07-13 19:53:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:01,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:01,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766894727] [2021-07-13 19:53:01,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766894727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:01,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540252985] [2021-07-13 19:53:01,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:01,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:01,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:01,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:01,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:01,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:01,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:01,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540252985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:01,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:01,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:01,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364562849] [2021-07-13 19:53:01,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:01,402 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:01,691 INFO L93 Difference]: Finished difference Result 1400 states and 5483 transitions. [2021-07-13 19:53:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:01,694 INFO L225 Difference]: With dead ends: 1400 [2021-07-13 19:53:01,694 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 19:53:01,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 19:53:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 884. [2021-07-13 19:53:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-07-13 19:53:01,708 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-07-13 19:53:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:01,708 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-07-13 19:53:01,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-07-13 19:53:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:01,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:01,710 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:01,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-13 19:53:01,925 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1360705344, now seen corresponding path program 10 times [2021-07-13 19:53:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:01,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059106640] [2021-07-13 19:53:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:01,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059106640] [2021-07-13 19:53:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059106640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760829906] [2021-07-13 19:53:01,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:02,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:02,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:02,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:02,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:02,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:02,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:02,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760829906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:02,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:02,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017071829] [2021-07-13 19:53:02,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:02,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:02,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:02,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:02,158 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:02,556 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-07-13 19:53:02,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:02,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:02,560 INFO L225 Difference]: With dead ends: 1770 [2021-07-13 19:53:02,560 INFO L226 Difference]: Without dead ends: 1699 [2021-07-13 19:53:02,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-07-13 19:53:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 916. [2021-07-13 19:53:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-07-13 19:53:02,577 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-07-13 19:53:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:02,577 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-07-13 19:53:02,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-07-13 19:53:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:02,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:02,579 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:02,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:02,781 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash -55965950, now seen corresponding path program 10 times [2021-07-13 19:53:02,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:02,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802400426] [2021-07-13 19:53:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802400426] [2021-07-13 19:53:02,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802400426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259372948] [2021-07-13 19:53:02,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:02,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:02,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:02,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:02,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:02,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:02,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:02,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:02,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:02,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259372948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:03,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:03,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40649434] [2021-07-13 19:53:03,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:03,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:03,009 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:03,427 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-07-13 19:53:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:03,430 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 19:53:03,430 INFO L226 Difference]: Without dead ends: 1657 [2021-07-13 19:53:03,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-13 19:53:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 884. [2021-07-13 19:53:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-07-13 19:53:03,445 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-07-13 19:53:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:03,445 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-07-13 19:53:03,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-07-13 19:53:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:03,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:03,447 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:03,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,652 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1118772638, now seen corresponding path program 11 times [2021-07-13 19:53:03,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:03,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320734825] [2021-07-13 19:53:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320734825] [2021-07-13 19:53:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320734825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660531502] [2021-07-13 19:53:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:03,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:03,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:03,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:03,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:03,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:03,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:03,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:03,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:03,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:53:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660531502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:03,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:03,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:03,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291120589] [2021-07-13 19:53:03,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:03,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:03,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:03,858 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,037 INFO L93 Difference]: Finished difference Result 1395 states and 5445 transitions. [2021-07-13 19:53:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:04,040 INFO L225 Difference]: With dead ends: 1395 [2021-07-13 19:53:04,040 INFO L226 Difference]: Without dead ends: 1314 [2021-07-13 19:53:04,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-07-13 19:53:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 923. [2021-07-13 19:53:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-07-13 19:53:04,054 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-07-13 19:53:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,054 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-07-13 19:53:04,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-07-13 19:53:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:04,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,056 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 19:53:04,272 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1871455264, now seen corresponding path program 11 times [2021-07-13 19:53:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009975422] [2021-07-13 19:53:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:04,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009975422] [2021-07-13 19:53:04,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009975422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985050409] [2021-07-13 19:53:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:04,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:04,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:04,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:04,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:53:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:04,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985050409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:04,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:04,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631960149] [2021-07-13 19:53:04,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:04,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:04,502 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,710 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-07-13 19:53:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:04,713 INFO L225 Difference]: With dead ends: 1351 [2021-07-13 19:53:04,713 INFO L226 Difference]: Without dead ends: 1270 [2021-07-13 19:53:04,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-07-13 19:53:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 893. [2021-07-13 19:53:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-07-13 19:53:04,726 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-07-13 19:53:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,726 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-07-13 19:53:04,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-07-13 19:53:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:04,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,728 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:53:04,928 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash 937883420, now seen corresponding path program 12 times [2021-07-13 19:53:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349905538] [2021-07-13 19:53:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:05,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349905538] [2021-07-13 19:53:05,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349905538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:05,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416698116] [2021-07-13 19:53:05,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:05,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:05,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:05,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:05,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:05,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:05,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:05,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:05,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416698116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:05,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:05,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583820443] [2021-07-13 19:53:05,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:05,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:05,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:05,203 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:05,917 INFO L93 Difference]: Finished difference Result 2174 states and 8231 transitions. [2021-07-13 19:53:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:05,921 INFO L225 Difference]: With dead ends: 2174 [2021-07-13 19:53:05,921 INFO L226 Difference]: Without dead ends: 1901 [2021-07-13 19:53:05,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:53:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2021-07-13 19:53:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 899. [2021-07-13 19:53:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.9621380846325165) internal successors, (3558), 898 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3558 transitions. [2021-07-13 19:53:05,937 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3558 transitions. Word has length 26 [2021-07-13 19:53:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:05,937 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3558 transitions. [2021-07-13 19:53:05,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3558 transitions. [2021-07-13 19:53:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:05,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:05,939 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:06,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,140 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1804311932, now seen corresponding path program 13 times [2021-07-13 19:53:06,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:06,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342130613] [2021-07-13 19:53:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342130613] [2021-07-13 19:53:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342130613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815887317] [2021-07-13 19:53:06,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:06,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:06,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:06,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:06,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:06,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:06,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:06,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815887317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:06,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:06,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482474255] [2021-07-13 19:53:06,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:06,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:06,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:06,345 INFO L87 Difference]: Start difference. First operand 899 states and 3558 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:06,651 INFO L93 Difference]: Finished difference Result 1423 states and 5561 transitions. [2021-07-13 19:53:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:06,654 INFO L225 Difference]: With dead ends: 1423 [2021-07-13 19:53:06,654 INFO L226 Difference]: Without dead ends: 1333 [2021-07-13 19:53:06,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-07-13 19:53:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 899. [2021-07-13 19:53:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.961024498886414) internal successors, (3557), 898 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3557 transitions. [2021-07-13 19:53:06,668 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3557 transitions. Word has length 26 [2021-07-13 19:53:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:06,668 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3557 transitions. [2021-07-13 19:53:06,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3557 transitions. [2021-07-13 19:53:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:06,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:06,670 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:06,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,870 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1228606434, now seen corresponding path program 12 times [2021-07-13 19:53:06,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:06,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151236018] [2021-07-13 19:53:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:06,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:06,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151236018] [2021-07-13 19:53:06,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151236018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632396160] [2021-07-13 19:53:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:07,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:07,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:07,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:07,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:07,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:07,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:07,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632396160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:07,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:07,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:07,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148052234] [2021-07-13 19:53:07,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:07,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:07,135 INFO L87 Difference]: Start difference. First operand 899 states and 3557 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:09,047 INFO L93 Difference]: Finished difference Result 2044 states and 7778 transitions. [2021-07-13 19:53:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:53:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:09,051 INFO L225 Difference]: With dead ends: 2044 [2021-07-13 19:53:09,051 INFO L226 Difference]: Without dead ends: 1885 [2021-07-13 19:53:09,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1393.9ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:53:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-07-13 19:53:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 928. [2021-07-13 19:53:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.9525350593311757) internal successors, (3664), 927 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3664 transitions. [2021-07-13 19:53:09,067 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3664 transitions. Word has length 26 [2021-07-13 19:53:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:09,068 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3664 transitions. [2021-07-13 19:53:09,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3664 transitions. [2021-07-13 19:53:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:09,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:09,069 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:09,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:09,286 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1670773786, now seen corresponding path program 13 times [2021-07-13 19:53:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:09,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310539407] [2021-07-13 19:53:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310539407] [2021-07-13 19:53:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310539407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254391423] [2021-07-13 19:53:09,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:09,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:09,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:09,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:09,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:09,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:09,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254391423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:09,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:09,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:09,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548498710] [2021-07-13 19:53:09,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:09,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:09,482 INFO L87 Difference]: Start difference. First operand 928 states and 3664 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:09,722 INFO L93 Difference]: Finished difference Result 1337 states and 5240 transitions. [2021-07-13 19:53:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:09,725 INFO L225 Difference]: With dead ends: 1337 [2021-07-13 19:53:09,725 INFO L226 Difference]: Without dead ends: 1254 [2021-07-13 19:53:09,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-07-13 19:53:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 922. [2021-07-13 19:53:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-13 19:53:09,740 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-13 19:53:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:09,740 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-13 19:53:09,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-13 19:53:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:09,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:09,741 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:09,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 19:53:09,942 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash 185293270, now seen corresponding path program 11 times [2021-07-13 19:53:09,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:09,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451578619] [2021-07-13 19:53:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:10,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451578619] [2021-07-13 19:53:10,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451578619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514395356] [2021-07-13 19:53:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:10,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:10,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:10,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:10,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,127 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-07-13 19:53:10,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-07-13 19:53:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514395356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:10,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:53:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229996147] [2021-07-13 19:53:10,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:10,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:10,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:10,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:10,172 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:10,408 INFO L93 Difference]: Finished difference Result 1343 states and 5277 transitions. [2021-07-13 19:53:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:10,411 INFO L225 Difference]: With dead ends: 1343 [2021-07-13 19:53:10,411 INFO L226 Difference]: Without dead ends: 1261 [2021-07-13 19:53:10,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-13 19:53:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 940. [2021-07-13 19:53:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-07-13 19:53:10,425 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-07-13 19:53:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:10,425 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-07-13 19:53:10,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-07-13 19:53:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:10,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:10,427 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:10,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:10,627 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -890966630, now seen corresponding path program 12 times [2021-07-13 19:53:10,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:10,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897923223] [2021-07-13 19:53:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897923223] [2021-07-13 19:53:10,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897923223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815251056] [2021-07-13 19:53:10,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:10,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:10,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:10,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:10,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:10,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:10,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-13 19:53:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815251056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:10,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:10,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:53:10,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581845316] [2021-07-13 19:53:10,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:53:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:53:10,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:10,844 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:11,249 INFO L93 Difference]: Finished difference Result 1447 states and 5652 transitions. [2021-07-13 19:53:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:11,252 INFO L225 Difference]: With dead ends: 1447 [2021-07-13 19:53:11,252 INFO L226 Difference]: Without dead ends: 1374 [2021-07-13 19:53:11,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-07-13 19:53:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 931. [2021-07-13 19:53:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-13 19:53:11,266 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-13 19:53:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:11,266 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-13 19:53:11,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-13 19:53:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:11,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:11,268 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:11,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:53:11,468 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 11 times [2021-07-13 19:53:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:11,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292060834] [2021-07-13 19:53:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:11,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:11,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292060834] [2021-07-13 19:53:11,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292060834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483802915] [2021-07-13 19:53:11,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:11,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:11,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:11,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:11,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:11,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:11,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:11,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:11,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483802915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:11,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:11,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:11,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620664577] [2021-07-13 19:53:11,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:11,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:11,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:11,662 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:11,873 INFO L93 Difference]: Finished difference Result 1296 states and 5089 transitions. [2021-07-13 19:53:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:11,875 INFO L225 Difference]: With dead ends: 1296 [2021-07-13 19:53:11,876 INFO L226 Difference]: Without dead ends: 1223 [2021-07-13 19:53:11,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-13 19:53:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 940. [2021-07-13 19:53:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-07-13 19:53:11,892 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-07-13 19:53:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:11,893 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-07-13 19:53:11,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-07-13 19:53:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:11,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:11,894 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:12,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:53:12,109 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1428609474, now seen corresponding path program 12 times [2021-07-13 19:53:12,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:12,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232018600] [2021-07-13 19:53:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:12,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232018600] [2021-07-13 19:53:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232018600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931396869] [2021-07-13 19:53:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:12,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:12,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:12,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:12,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:12,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:12,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:12,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-13 19:53:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931396869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:12,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:12,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:53:12,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410280113] [2021-07-13 19:53:12,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:53:12,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:12,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:53:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:12,369 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:13,357 INFO L93 Difference]: Finished difference Result 1720 states and 6760 transitions. [2021-07-13 19:53:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:53:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:13,361 INFO L225 Difference]: With dead ends: 1720 [2021-07-13 19:53:13,361 INFO L226 Difference]: Without dead ends: 1645 [2021-07-13 19:53:13,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-07-13 19:53:13,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 931. [2021-07-13 19:53:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-13 19:53:13,377 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-13 19:53:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:13,377 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-13 19:53:13,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-13 19:53:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:13,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:13,379 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:13,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:53:13,593 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash 450176604, now seen corresponding path program 13 times [2021-07-13 19:53:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:13,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066047295] [2021-07-13 19:53:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:13,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:13,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066047295] [2021-07-13 19:53:13,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066047295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:13,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564246920] [2021-07-13 19:53:13,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:13,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:13,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:13,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:13,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:13,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:13,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:53:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:13,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564246920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:13,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:13,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:13,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280651513] [2021-07-13 19:53:13,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:13,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:13,790 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:14,015 INFO L93 Difference]: Finished difference Result 1323 states and 5177 transitions. [2021-07-13 19:53:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:14,017 INFO L225 Difference]: With dead ends: 1323 [2021-07-13 19:53:14,017 INFO L226 Difference]: Without dead ends: 1252 [2021-07-13 19:53:14,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-07-13 19:53:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 955. [2021-07-13 19:53:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-07-13 19:53:14,031 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-07-13 19:53:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:14,031 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-07-13 19:53:14,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-07-13 19:53:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:14,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:14,033 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:14,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 19:53:14,234 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1315832056, now seen corresponding path program 13 times [2021-07-13 19:53:14,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:14,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378542040] [2021-07-13 19:53:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:14,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378542040] [2021-07-13 19:53:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378542040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50875046] [2021-07-13 19:53:14,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:14,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:14,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:14,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:14,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:14,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-07-13 19:53:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50875046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:14,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:14,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852531305] [2021-07-13 19:53:14,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:14,429 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:14,651 INFO L93 Difference]: Finished difference Result 1359 states and 5303 transitions. [2021-07-13 19:53:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:14,654 INFO L225 Difference]: With dead ends: 1359 [2021-07-13 19:53:14,654 INFO L226 Difference]: Without dead ends: 1288 [2021-07-13 19:53:14,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-13 19:53:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 922. [2021-07-13 19:53:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-13 19:53:14,667 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-13 19:53:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:14,667 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-13 19:53:14,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-13 19:53:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:14,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:14,669 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:14,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:14,870 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:14,870 INFO L82 PathProgramCache]: Analyzing trace with hash -457858102, now seen corresponding path program 14 times [2021-07-13 19:53:14,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:14,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442659800] [2021-07-13 19:53:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:14,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442659800] [2021-07-13 19:53:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442659800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:14,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420633368] [2021-07-13 19:53:14,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:14,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:14,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:14,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:15,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:15,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:15,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:15,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420633368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:15,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165657922] [2021-07-13 19:53:15,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:15,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:15,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:15,095 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:15,480 INFO L93 Difference]: Finished difference Result 1628 states and 6288 transitions. [2021-07-13 19:53:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:15,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:15,483 INFO L225 Difference]: With dead ends: 1628 [2021-07-13 19:53:15,483 INFO L226 Difference]: Without dead ends: 1537 [2021-07-13 19:53:15,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-07-13 19:53:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 964. [2021-07-13 19:53:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-07-13 19:53:15,499 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-07-13 19:53:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:15,499 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-07-13 19:53:15,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-07-13 19:53:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:15,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:15,501 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:15,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:53:15,701 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 915987316, now seen corresponding path program 14 times [2021-07-13 19:53:15,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:15,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936018688] [2021-07-13 19:53:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936018688] [2021-07-13 19:53:15,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936018688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991417374] [2021-07-13 19:53:15,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:15,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:15,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:15,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:15,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:15,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:15,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:15,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:15,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-07-13 19:53:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:15,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991417374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:15,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:15,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:53:15,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927059687] [2021-07-13 19:53:15,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:53:15,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:53:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:15,965 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:16,702 INFO L93 Difference]: Finished difference Result 1752 states and 6896 transitions. [2021-07-13 19:53:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:16,705 INFO L225 Difference]: With dead ends: 1752 [2021-07-13 19:53:16,706 INFO L226 Difference]: Without dead ends: 1670 [2021-07-13 19:53:16,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:53:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-13 19:53:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 931. [2021-07-13 19:53:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-07-13 19:53:16,721 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-07-13 19:53:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:16,721 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-07-13 19:53:16,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-07-13 19:53:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:16,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:16,723 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:16,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:16,923 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -542256876, now seen corresponding path program 15 times [2021-07-13 19:53:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:16,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018266337] [2021-07-13 19:53:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:16,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018266337] [2021-07-13 19:53:16,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018266337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607882508] [2021-07-13 19:53:16,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:17,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:17,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:17,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:17,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:17,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:17,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:17,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:17,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:17,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-07-13 19:53:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:17,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607882508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:17,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:17,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:53:17,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354318943] [2021-07-13 19:53:17,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:17,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:17,218 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:17,837 INFO L93 Difference]: Finished difference Result 1720 states and 6672 transitions. [2021-07-13 19:53:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:53:17,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:17,840 INFO L225 Difference]: With dead ends: 1720 [2021-07-13 19:53:17,840 INFO L226 Difference]: Without dead ends: 1556 [2021-07-13 19:53:17,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-07-13 19:53:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 931. [2021-07-13 19:53:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-07-13 19:53:17,855 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-07-13 19:53:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:17,855 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-07-13 19:53:17,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-07-13 19:53:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:17,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:17,857 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:18,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-13 19:53:18,059 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:18,059 INFO L82 PathProgramCache]: Analyzing trace with hash 349033132, now seen corresponding path program 16 times [2021-07-13 19:53:18,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:18,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14334481] [2021-07-13 19:53:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:18,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:18,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14334481] [2021-07-13 19:53:18,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14334481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:18,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870088978] [2021-07-13 19:53:18,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:18,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:18,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:18,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:18,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:18,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:18,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:18,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870088978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:18,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:18,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447462664] [2021-07-13 19:53:18,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:18,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:18,281 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:18,606 INFO L93 Difference]: Finished difference Result 1440 states and 5633 transitions. [2021-07-13 19:53:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:18,609 INFO L225 Difference]: With dead ends: 1440 [2021-07-13 19:53:18,609 INFO L226 Difference]: Without dead ends: 1350 [2021-07-13 19:53:18,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-13 19:53:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 931. [2021-07-13 19:53:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-07-13 19:53:18,623 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-07-13 19:53:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:18,623 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-07-13 19:53:18,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-07-13 19:53:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:18,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:18,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:18,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:53:18,826 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1924590312, now seen corresponding path program 15 times [2021-07-13 19:53:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:18,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599211265] [2021-07-13 19:53:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:18,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599211265] [2021-07-13 19:53:18,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599211265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478789630] [2021-07-13 19:53:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:18,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:18,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:18,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:18,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:18,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:18,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:18,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:18,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-07-13 19:53:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:19,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478789630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:19,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:19,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:53:19,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160572867] [2021-07-13 19:53:19,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:53:19,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:19,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:53:19,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:19,074 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:20,116 INFO L93 Difference]: Finished difference Result 1839 states and 7230 transitions. [2021-07-13 19:53:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:53:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:20,120 INFO L225 Difference]: With dead ends: 1839 [2021-07-13 19:53:20,120 INFO L226 Difference]: Without dead ends: 1757 [2021-07-13 19:53:20,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-07-13 19:53:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 940. [2021-07-13 19:53:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-07-13 19:53:20,135 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-07-13 19:53:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:20,136 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-07-13 19:53:20,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-07-13 19:53:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:20,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:20,137 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:20,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 19:53:20,338 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash 632635148, now seen corresponding path program 16 times [2021-07-13 19:53:20,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:20,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534074290] [2021-07-13 19:53:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:20,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:20,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534074290] [2021-07-13 19:53:20,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534074290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:20,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517967292] [2021-07-13 19:53:20,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:20,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:20,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:20,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:20,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:20,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:20,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:20,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:20,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517967292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:20,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:20,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:20,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294551290] [2021-07-13 19:53:20,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:20,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:20,529 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:20,734 INFO L93 Difference]: Finished difference Result 1338 states and 5238 transitions. [2021-07-13 19:53:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:20,737 INFO L225 Difference]: With dead ends: 1338 [2021-07-13 19:53:20,737 INFO L226 Difference]: Without dead ends: 1265 [2021-07-13 19:53:20,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-13 19:53:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 922. [2021-07-13 19:53:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-13 19:53:20,751 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-13 19:53:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:20,751 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-13 19:53:20,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-13 19:53:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:20,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:20,753 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:20,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:20,953 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-07-13 19:53:20,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:20,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982843105] [2021-07-13 19:53:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:21,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982843105] [2021-07-13 19:53:21,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982843105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468937936] [2021-07-13 19:53:21,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:21,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:21,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:21,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:21,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:21,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:21,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:21,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:21,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-13 19:53:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:21,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468937936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:21,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:21,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:21,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488542080] [2021-07-13 19:53:21,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:21,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:21,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:21,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:21,220 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:22,006 INFO L93 Difference]: Finished difference Result 1733 states and 6757 transitions. [2021-07-13 19:53:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:53:22,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:22,010 INFO L225 Difference]: With dead ends: 1733 [2021-07-13 19:53:22,010 INFO L226 Difference]: Without dead ends: 1660 [2021-07-13 19:53:22,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:53:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-07-13 19:53:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 958. [2021-07-13 19:53:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-07-13 19:53:22,025 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-07-13 19:53:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:22,026 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-07-13 19:53:22,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-07-13 19:53:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:22,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:22,027 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:22,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 19:53:22,229 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash -718822330, now seen corresponding path program 14 times [2021-07-13 19:53:22,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:22,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330327630] [2021-07-13 19:53:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:22,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:22,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330327630] [2021-07-13 19:53:22,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330327630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:22,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695299908] [2021-07-13 19:53:22,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:22,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:22,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:22,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:22,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:22,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:22,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:22,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-13 19:53:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:22,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695299908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:22,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:22,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:53:22,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851076272] [2021-07-13 19:53:22,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:22,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:22,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:22,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:22,521 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:23,306 INFO L93 Difference]: Finished difference Result 1770 states and 6931 transitions. [2021-07-13 19:53:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:23,310 INFO L225 Difference]: With dead ends: 1770 [2021-07-13 19:53:23,310 INFO L226 Difference]: Without dead ends: 1697 [2021-07-13 19:53:23,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 539.2ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-07-13 19:53:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 931. [2021-07-13 19:53:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-13 19:53:23,325 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-13 19:53:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:23,325 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-13 19:53:23,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-13 19:53:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:23,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:23,327 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:23,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,528 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-07-13 19:53:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:23,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054457077] [2021-07-13 19:53:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054457077] [2021-07-13 19:53:23,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054457077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824322128] [2021-07-13 19:53:23,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:23,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:23,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:23,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:23,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:23,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:23,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:23,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:23,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:23,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:23,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824322128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:23,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:23,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220656967] [2021-07-13 19:53:23,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:23,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:23,768 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:24,877 INFO L93 Difference]: Finished difference Result 1771 states and 6888 transitions. [2021-07-13 19:53:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:53:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:24,881 INFO L225 Difference]: With dead ends: 1771 [2021-07-13 19:53:24,881 INFO L226 Difference]: Without dead ends: 1698 [2021-07-13 19:53:24,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 748.0ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-07-13 19:53:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 940. [2021-07-13 19:53:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-07-13 19:53:24,897 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-07-13 19:53:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:24,897 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-07-13 19:53:24,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-07-13 19:53:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:24,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:24,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:25,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 19:53:25,099 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-07-13 19:53:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:25,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774038583] [2021-07-13 19:53:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:25,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774038583] [2021-07-13 19:53:25,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774038583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691504496] [2021-07-13 19:53:25,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:25,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:25,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:25,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:25,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:25,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:25,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:25,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691504496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:25,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970629926] [2021-07-13 19:53:25,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:25,295 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:25,503 INFO L93 Difference]: Finished difference Result 1357 states and 5335 transitions. [2021-07-13 19:53:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:25,506 INFO L225 Difference]: With dead ends: 1357 [2021-07-13 19:53:25,506 INFO L226 Difference]: Without dead ends: 1274 [2021-07-13 19:53:25,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-07-13 19:53:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-07-13 19:53:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-07-13 19:53:25,520 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-07-13 19:53:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:25,520 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-07-13 19:53:25,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-07-13 19:53:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:25,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:25,522 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:53:25,725 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash -12293946, now seen corresponding path program 15 times [2021-07-13 19:53:25,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:25,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518177845] [2021-07-13 19:53:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:25,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518177845] [2021-07-13 19:53:25,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518177845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275835550] [2021-07-13 19:53:25,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:25,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:25,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:25,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:25,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:25,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:25,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:25,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:25,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:25,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275835550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:25,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:25,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:25,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521940056] [2021-07-13 19:53:25,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:25,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:25,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:25,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:25,970 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:26,688 INFO L93 Difference]: Finished difference Result 1666 states and 6528 transitions. [2021-07-13 19:53:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:53:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:26,691 INFO L225 Difference]: With dead ends: 1666 [2021-07-13 19:53:26,691 INFO L226 Difference]: Without dead ends: 1593 [2021-07-13 19:53:26,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-07-13 19:53:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 940. [2021-07-13 19:53:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-07-13 19:53:26,706 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-07-13 19:53:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:26,706 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-07-13 19:53:26,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-07-13 19:53:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:26,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:26,708 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:26,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:53:26,908 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:26,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2125331096, now seen corresponding path program 16 times [2021-07-13 19:53:26,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:26,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57946521] [2021-07-13 19:53:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:26,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57946521] [2021-07-13 19:53:26,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57946521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979214492] [2021-07-13 19:53:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:26,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:27,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:27,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:27,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:27,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979214492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:27,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:27,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221406423] [2021-07-13 19:53:27,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:27,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:27,102 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:27,299 INFO L93 Difference]: Finished difference Result 1299 states and 5104 transitions. [2021-07-13 19:53:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:27,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:27,302 INFO L225 Difference]: With dead ends: 1299 [2021-07-13 19:53:27,302 INFO L226 Difference]: Without dead ends: 1224 [2021-07-13 19:53:27,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-07-13 19:53:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 922. [2021-07-13 19:53:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-07-13 19:53:27,315 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-07-13 19:53:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:27,315 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-07-13 19:53:27,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-07-13 19:53:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:27,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:27,317 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:27,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:27,519 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash 514209786, now seen corresponding path program 17 times [2021-07-13 19:53:27,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:27,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124738265] [2021-07-13 19:53:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:27,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124738265] [2021-07-13 19:53:27,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124738265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293796431] [2021-07-13 19:53:27,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:27,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:27,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:27,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:27,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:27,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:27,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:27,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293796431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:27,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:27,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:27,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001893468] [2021-07-13 19:53:27,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:27,756 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:28,264 INFO L93 Difference]: Finished difference Result 2168 states and 8464 transitions. [2021-07-13 19:53:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:28,269 INFO L225 Difference]: With dead ends: 2168 [2021-07-13 19:53:28,269 INFO L226 Difference]: Without dead ends: 2086 [2021-07-13 19:53:28,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:53:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-13 19:53:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 984. [2021-07-13 19:53:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.9114954221770093) internal successors, (3845), 983 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3845 transitions. [2021-07-13 19:53:28,294 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3845 transitions. Word has length 26 [2021-07-13 19:53:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:28,294 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3845 transitions. [2021-07-13 19:53:28,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3845 transitions. [2021-07-13 19:53:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:28,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:28,296 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:28,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:53:28,496 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1888055204, now seen corresponding path program 17 times [2021-07-13 19:53:28,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:28,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144699103] [2021-07-13 19:53:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144699103] [2021-07-13 19:53:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144699103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444427389] [2021-07-13 19:53:28,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:28,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:28,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:28,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:28,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:28,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444427389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:28,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:28,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:28,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490853409] [2021-07-13 19:53:28,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:28,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:28,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:28,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:28,709 INFO L87 Difference]: Start difference. First operand 984 states and 3845 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:29,142 INFO L93 Difference]: Finished difference Result 2118 states and 8296 transitions. [2021-07-13 19:53:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:29,146 INFO L225 Difference]: With dead ends: 2118 [2021-07-13 19:53:29,146 INFO L226 Difference]: Without dead ends: 2036 [2021-07-13 19:53:29,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-07-13 19:53:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 954. [2021-07-13 19:53:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-07-13 19:53:29,164 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-07-13 19:53:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:29,164 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-07-13 19:53:29,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-07-13 19:53:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:29,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:29,165 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:29,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 19:53:29,366 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1300056958, now seen corresponding path program 18 times [2021-07-13 19:53:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:29,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550749657] [2021-07-13 19:53:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550749657] [2021-07-13 19:53:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550749657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318722402] [2021-07-13 19:53:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:29,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:29,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:29,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:29,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:29,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:29,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:29,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-13 19:53:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:29,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318722402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:29,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:29,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:53:29,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321887972] [2021-07-13 19:53:29,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:29,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:29,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:29,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:29,635 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:30,293 INFO L93 Difference]: Finished difference Result 2208 states and 8474 transitions. [2021-07-13 19:53:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:30,298 INFO L225 Difference]: With dead ends: 2208 [2021-07-13 19:53:30,298 INFO L226 Difference]: Without dead ends: 2044 [2021-07-13 19:53:30,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:53:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-07-13 19:53:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 996. [2021-07-13 19:53:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.9115577889447235) internal successors, (3892), 995 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3892 transitions. [2021-07-13 19:53:30,322 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3892 transitions. Word has length 26 [2021-07-13 19:53:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:30,322 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3892 transitions. [2021-07-13 19:53:30,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3892 transitions. [2021-07-13 19:53:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:30,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:30,324 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:30,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:30,533 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 73788460, now seen corresponding path program 18 times [2021-07-13 19:53:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:30,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555516344] [2021-07-13 19:53:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:30,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555516344] [2021-07-13 19:53:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555516344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130660026] [2021-07-13 19:53:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:30,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:30,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:30,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:30,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:30,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:30,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:30,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-07-13 19:53:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130660026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:30,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:30,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:53:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42390834] [2021-07-13 19:53:30,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:53:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:53:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:30,818 INFO L87 Difference]: Start difference. First operand 996 states and 3892 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:31,648 INFO L93 Difference]: Finished difference Result 1751 states and 6865 transitions. [2021-07-13 19:53:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:53:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:31,652 INFO L225 Difference]: With dead ends: 1751 [2021-07-13 19:53:31,652 INFO L226 Difference]: Without dead ends: 1669 [2021-07-13 19:53:31,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:53:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-07-13 19:53:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 963. [2021-07-13 19:53:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-07-13 19:53:31,667 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-07-13 19:53:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:31,667 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-07-13 19:53:31,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-07-13 19:53:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:31,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:31,668 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:31,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:31,869 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1153064272, now seen corresponding path program 19 times [2021-07-13 19:53:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:31,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814701626] [2021-07-13 19:53:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:31,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:31,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814701626] [2021-07-13 19:53:31,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814701626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:31,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7369975] [2021-07-13 19:53:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:32,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:32,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7369975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:32,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:32,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9895305] [2021-07-13 19:53:32,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:32,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:32,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:32,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:32,101 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:32,559 INFO L93 Difference]: Finished difference Result 1759 states and 6856 transitions. [2021-07-13 19:53:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:53:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:32,563 INFO L225 Difference]: With dead ends: 1759 [2021-07-13 19:53:32,563 INFO L226 Difference]: Without dead ends: 1668 [2021-07-13 19:53:32,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:53:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-07-13 19:53:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 963. [2021-07-13 19:53:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-07-13 19:53:32,578 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-07-13 19:53:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:32,578 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-07-13 19:53:32,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-07-13 19:53:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:32,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:32,579 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:32,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 19:53:32,794 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354280, now seen corresponding path program 20 times [2021-07-13 19:53:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:32,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977391257] [2021-07-13 19:53:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:32,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:32,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977391257] [2021-07-13 19:53:32,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977391257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:32,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791791222] [2021-07-13 19:53:32,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:32,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:32,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:32,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:32,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:32,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:32,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:32,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:32,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791791222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:33,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:33,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255124139] [2021-07-13 19:53:33,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:33,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:33,026 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:33,537 INFO L93 Difference]: Finished difference Result 1718 states and 6708 transitions. [2021-07-13 19:53:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:53:33,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:33,541 INFO L225 Difference]: With dead ends: 1718 [2021-07-13 19:53:33,541 INFO L226 Difference]: Without dead ends: 1628 [2021-07-13 19:53:33,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-13 19:53:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 963. [2021-07-13 19:53:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-07-13 19:53:33,556 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-07-13 19:53:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:33,556 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-07-13 19:53:33,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-07-13 19:53:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:33,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:33,558 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:33,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:33,758 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash -229269164, now seen corresponding path program 19 times [2021-07-13 19:53:33,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:33,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291852642] [2021-07-13 19:53:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:33,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291852642] [2021-07-13 19:53:33,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291852642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432794122] [2021-07-13 19:53:33,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:33,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:33,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:33,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:33,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432794122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:33,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:33,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:33,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371926866] [2021-07-13 19:53:33,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:33,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:33,959 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:34,276 INFO L93 Difference]: Finished difference Result 1509 states and 5906 transitions. [2021-07-13 19:53:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:34,279 INFO L225 Difference]: With dead ends: 1509 [2021-07-13 19:53:34,279 INFO L226 Difference]: Without dead ends: 1427 [2021-07-13 19:53:34,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-07-13 19:53:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 972. [2021-07-13 19:53:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9309989701338828) internal successors, (3817), 971 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3817 transitions. [2021-07-13 19:53:34,293 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3817 transitions. Word has length 26 [2021-07-13 19:53:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:34,293 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3817 transitions. [2021-07-13 19:53:34,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3817 transitions. [2021-07-13 19:53:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:34,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:34,295 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:34,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:53:34,495 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:34,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1967011000, now seen corresponding path program 20 times [2021-07-13 19:53:34,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:34,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951260504] [2021-07-13 19:53:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:34,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:34,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951260504] [2021-07-13 19:53:34,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951260504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:34,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129993612] [2021-07-13 19:53:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:34,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:34,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:34,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:34,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:34,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:34,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:34,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:34,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:34,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129993612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:34,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:34,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:34,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105533344] [2021-07-13 19:53:34,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:34,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:34,728 INFO L87 Difference]: Start difference. First operand 972 states and 3817 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:35,035 INFO L93 Difference]: Finished difference Result 1493 states and 5826 transitions. [2021-07-13 19:53:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:53:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:35,038 INFO L225 Difference]: With dead ends: 1493 [2021-07-13 19:53:35,038 INFO L226 Difference]: Without dead ends: 1420 [2021-07-13 19:53:35,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-07-13 19:53:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 954. [2021-07-13 19:53:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-07-13 19:53:35,052 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-07-13 19:53:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:35,053 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-07-13 19:53:35,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-07-13 19:53:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:35,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:35,054 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:35,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:35,255 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-07-13 19:53:35,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:35,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904755024] [2021-07-13 19:53:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:35,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904755024] [2021-07-13 19:53:35,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904755024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361951432] [2021-07-13 19:53:35,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:35,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:35,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:35,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:35,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:35,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:35,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:35,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361951432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:35,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:35,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608270848] [2021-07-13 19:53:35,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:35,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:35,444 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:35,850 INFO L93 Difference]: Finished difference Result 1935 states and 7456 transitions. [2021-07-13 19:53:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:35,853 INFO L225 Difference]: With dead ends: 1935 [2021-07-13 19:53:35,853 INFO L226 Difference]: Without dead ends: 1862 [2021-07-13 19:53:35,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-13 19:53:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1004. [2021-07-13 19:53:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.8913260219341974) internal successors, (3903), 1003 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3903 transitions. [2021-07-13 19:53:35,869 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3903 transitions. Word has length 26 [2021-07-13 19:53:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:35,869 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 3903 transitions. [2021-07-13 19:53:35,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3903 transitions. [2021-07-13 19:53:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:35,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:35,871 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:36,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:36,072 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:36,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1186953610, now seen corresponding path program 17 times [2021-07-13 19:53:36,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:36,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117365177] [2021-07-13 19:53:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:36,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:36,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117365177] [2021-07-13 19:53:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117365177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:36,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626615635] [2021-07-13 19:53:36,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:36,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:36,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:53:36,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:36,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:36,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:36,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-07-13 19:53:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:36,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626615635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:36,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:36,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-13 19:53:36,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704167498] [2021-07-13 19:53:36,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:53:36,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:36,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:53:36,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:53:36,283 INFO L87 Difference]: Start difference. First operand 1004 states and 3903 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:36,658 INFO L93 Difference]: Finished difference Result 1890 states and 7297 transitions. [2021-07-13 19:53:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:36,662 INFO L225 Difference]: With dead ends: 1890 [2021-07-13 19:53:36,662 INFO L226 Difference]: Without dead ends: 1817 [2021-07-13 19:53:36,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-07-13 19:53:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 960. [2021-07-13 19:53:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-07-13 19:53:36,684 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-07-13 19:53:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:36,685 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-07-13 19:53:36,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-07-13 19:53:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:36,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:36,686 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:36,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 19:53:36,887 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1349864576, now seen corresponding path program 18 times [2021-07-13 19:53:36,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:36,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549921034] [2021-07-13 19:53:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:36,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:36,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549921034] [2021-07-13 19:53:36,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549921034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:36,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323197111] [2021-07-13 19:53:36,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:36,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:37,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:37,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:37,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:37,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:37,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-13 19:53:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:37,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323197111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:37,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:37,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:37,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693227390] [2021-07-13 19:53:37,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:37,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:37,166 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:38,031 INFO L93 Difference]: Finished difference Result 1716 states and 6679 transitions. [2021-07-13 19:53:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:53:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:38,035 INFO L225 Difference]: With dead ends: 1716 [2021-07-13 19:53:38,035 INFO L226 Difference]: Without dead ends: 1643 [2021-07-13 19:53:38,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:53:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-07-13 19:53:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 996. [2021-07-13 19:53:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.912562814070352) internal successors, (3893), 995 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3893 transitions. [2021-07-13 19:53:38,050 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3893 transitions. Word has length 26 [2021-07-13 19:53:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:38,050 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3893 transitions. [2021-07-13 19:53:38,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3893 transitions. [2021-07-13 19:53:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:38,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:38,052 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:38,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:38,264 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1164870918, now seen corresponding path program 18 times [2021-07-13 19:53:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:38,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969501133] [2021-07-13 19:53:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969501133] [2021-07-13 19:53:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969501133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562738538] [2021-07-13 19:53:38,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:38,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:53:38,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:38,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:38,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:38,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:38,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:38,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-07-13 19:53:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:38,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562738538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:38,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:38,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 19:53:38,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568415977] [2021-07-13 19:53:38,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:53:38,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:38,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:53:38,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:38,553 INFO L87 Difference]: Start difference. First operand 996 states and 3893 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:39,466 INFO L93 Difference]: Finished difference Result 1753 states and 6853 transitions. [2021-07-13 19:53:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:53:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:39,470 INFO L225 Difference]: With dead ends: 1753 [2021-07-13 19:53:39,470 INFO L226 Difference]: Without dead ends: 1680 [2021-07-13 19:53:39,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:53:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-07-13 19:53:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 969. [2021-07-13 19:53:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-07-13 19:53:39,485 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-07-13 19:53:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:39,485 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-07-13 19:53:39,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-07-13 19:53:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:39,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:39,486 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:39,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:39,702 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-07-13 19:53:39,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:39,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641055054] [2021-07-13 19:53:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:39,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641055054] [2021-07-13 19:53:39,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641055054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647452316] [2021-07-13 19:53:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:39,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:39,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:39,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:39,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:39,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647452316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:39,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:39,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:39,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718900187] [2021-07-13 19:53:39,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:39,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:39,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:39,922 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:40,218 INFO L93 Difference]: Finished difference Result 1492 states and 5839 transitions. [2021-07-13 19:53:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:40,221 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 19:53:40,221 INFO L226 Difference]: Without dead ends: 1419 [2021-07-13 19:53:40,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-07-13 19:53:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 978. [2021-07-13 19:53:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.930399181166837) internal successors, (3840), 977 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3840 transitions. [2021-07-13 19:53:40,251 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3840 transitions. Word has length 26 [2021-07-13 19:53:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:40,251 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3840 transitions. [2021-07-13 19:53:40,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3840 transitions. [2021-07-13 19:53:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:40,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:40,253 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:40,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 19:53:40,453 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-07-13 19:53:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:40,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447895884] [2021-07-13 19:53:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:40,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447895884] [2021-07-13 19:53:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447895884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810851017] [2021-07-13 19:53:40,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:40,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:40,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:40,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:40,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:40,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:40,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:40,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810851017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:40,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:40,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115781406] [2021-07-13 19:53:40,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:40,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:40,823 INFO L87 Difference]: Start difference. First operand 978 states and 3840 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:41,928 INFO L93 Difference]: Finished difference Result 1759 states and 6869 transitions. [2021-07-13 19:53:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:53:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:41,932 INFO L225 Difference]: With dead ends: 1759 [2021-07-13 19:53:41,932 INFO L226 Difference]: Without dead ends: 1676 [2021-07-13 19:53:41,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-07-13 19:53:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 969. [2021-07-13 19:53:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-07-13 19:53:41,948 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-07-13 19:53:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:41,948 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-07-13 19:53:41,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-07-13 19:53:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:41,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:41,949 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:42,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:53:42,165 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash -458342534, now seen corresponding path program 19 times [2021-07-13 19:53:42,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:42,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290407226] [2021-07-13 19:53:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:42,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:42,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290407226] [2021-07-13 19:53:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290407226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:42,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199936825] [2021-07-13 19:53:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:53:42,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:42,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:53:42,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:53:42,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:53:42,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:42,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:42,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-07-13 19:53:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:42,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199936825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:42,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:42,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:53:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093802608] [2021-07-13 19:53:42,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:53:42,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:53:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:42,481 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:42,995 INFO L93 Difference]: Finished difference Result 1439 states and 5646 transitions. [2021-07-13 19:53:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:42,998 INFO L225 Difference]: With dead ends: 1439 [2021-07-13 19:53:42,998 INFO L226 Difference]: Without dead ends: 1366 [2021-07-13 19:53:42,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-13 19:53:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 978. [2021-07-13 19:53:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.9314227226202663) internal successors, (3841), 977 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3841 transitions. [2021-07-13 19:53:43,034 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3841 transitions. Word has length 26 [2021-07-13 19:53:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:43,034 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3841 transitions. [2021-07-13 19:53:43,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3841 transitions. [2021-07-13 19:53:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:53:43,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:43,036 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:43,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:53:43,253 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1723587612, now seen corresponding path program 20 times [2021-07-13 19:53:43,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:43,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118877881] [2021-07-13 19:53:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:43,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118877881] [2021-07-13 19:53:43,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118877881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032200947] [2021-07-13 19:53:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:43,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:53:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:43,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:43,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 19:53:43,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:53:43,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:53:43,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:53:43,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-13 19:53:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:43,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032200947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:43,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:43,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:53:43,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387629965] [2021-07-13 19:53:43,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:53:43,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:53:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:43,589 INFO L87 Difference]: Start difference. First operand 978 states and 3841 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:44,770 INFO L93 Difference]: Finished difference Result 1688 states and 6589 transitions. [2021-07-13 19:53:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:53:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:53:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:44,773 INFO L225 Difference]: With dead ends: 1688 [2021-07-13 19:53:44,773 INFO L226 Difference]: Without dead ends: 1613 [2021-07-13 19:53:44,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:53:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-07-13 19:53:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 960. [2021-07-13 19:53:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-07-13 19:53:44,789 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-07-13 19:53:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:44,789 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-07-13 19:53:44,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-07-13 19:53:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:44,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:44,790 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:45,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:45,006 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1893964963, now seen corresponding path program 21 times [2021-07-13 19:53:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:45,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319743792] [2021-07-13 19:53:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:45,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319743792] [2021-07-13 19:53:45,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319743792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307683032] [2021-07-13 19:53:45,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:45,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:53:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307683032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:45,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:53:45,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405105940] [2021-07-13 19:53:45,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:45,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:45,116 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:45,336 INFO L93 Difference]: Finished difference Result 3279 states and 12423 transitions. [2021-07-13 19:53:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:53:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:45,342 INFO L225 Difference]: With dead ends: 3279 [2021-07-13 19:53:45,342 INFO L226 Difference]: Without dead ends: 3102 [2021-07-13 19:53:45,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:53:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2021-07-13 19:53:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 1434. [2021-07-13 19:53:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 4.174459176552687) internal successors, (5982), 1433 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 5982 transitions. [2021-07-13 19:53:45,383 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 5982 transitions. Word has length 28 [2021-07-13 19:53:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:45,383 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 5982 transitions. [2021-07-13 19:53:45,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 5982 transitions. [2021-07-13 19:53:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:45,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:45,385 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:45,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 19:53:45,586 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash 734851235, now seen corresponding path program 22 times [2021-07-13 19:53:45,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:45,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731123160] [2021-07-13 19:53:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731123160] [2021-07-13 19:53:45,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731123160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021277258] [2021-07-13 19:53:45,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:45,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:45,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:45,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021277258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:45,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:45,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:53:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141783081] [2021-07-13 19:53:45,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:45,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:45,707 INFO L87 Difference]: Start difference. First operand 1434 states and 5982 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:45,886 INFO L93 Difference]: Finished difference Result 3236 states and 12555 transitions. [2021-07-13 19:53:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:53:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:45,891 INFO L225 Difference]: With dead ends: 3236 [2021-07-13 19:53:45,892 INFO L226 Difference]: Without dead ends: 2982 [2021-07-13 19:53:45,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-07-13 19:53:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1795. [2021-07-13 19:53:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 4.193979933110368) internal successors, (7524), 1794 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 7524 transitions. [2021-07-13 19:53:45,924 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 7524 transitions. Word has length 28 [2021-07-13 19:53:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:45,925 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 7524 transitions. [2021-07-13 19:53:45,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 7524 transitions. [2021-07-13 19:53:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:45,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:45,928 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:46,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:46,128 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1098043517, now seen corresponding path program 23 times [2021-07-13 19:53:46,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:46,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536094829] [2021-07-13 19:53:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:46,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:46,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536094829] [2021-07-13 19:53:46,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536094829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:46,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707158207] [2021-07-13 19:53:46,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:46,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:46,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:46,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707158207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:46,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:46,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:46,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070767198] [2021-07-13 19:53:46,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:46,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:46,250 INFO L87 Difference]: Start difference. First operand 1795 states and 7524 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:46,433 INFO L93 Difference]: Finished difference Result 3187 states and 12461 transitions. [2021-07-13 19:53:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:46,439 INFO L225 Difference]: With dead ends: 3187 [2021-07-13 19:53:46,439 INFO L226 Difference]: Without dead ends: 3089 [2021-07-13 19:53:46,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-07-13 19:53:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1790. [2021-07-13 19:53:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 4.18278367803242) internal successors, (7483), 1789 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 7483 transitions. [2021-07-13 19:53:46,475 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 7483 transitions. Word has length 28 [2021-07-13 19:53:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:46,476 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 7483 transitions. [2021-07-13 19:53:46,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 7483 transitions. [2021-07-13 19:53:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:46,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:46,479 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:46,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:46,684 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1929816143, now seen corresponding path program 24 times [2021-07-13 19:53:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:46,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386567651] [2021-07-13 19:53:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:46,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:46,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386567651] [2021-07-13 19:53:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386567651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:46,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849383488] [2021-07-13 19:53:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:46,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:46,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849383488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:46,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:46,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:46,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568447313] [2021-07-13 19:53:46,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:46,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:46,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:46,818 INFO L87 Difference]: Start difference. First operand 1790 states and 7483 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:46,943 INFO L93 Difference]: Finished difference Result 3507 states and 13666 transitions. [2021-07-13 19:53:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:46,950 INFO L225 Difference]: With dead ends: 3507 [2021-07-13 19:53:46,950 INFO L226 Difference]: Without dead ends: 3255 [2021-07-13 19:53:46,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-07-13 19:53:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2159. [2021-07-13 19:53:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 4.244670991658944) internal successors, (9160), 2158 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 9160 transitions. [2021-07-13 19:53:46,991 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 9160 transitions. Word has length 28 [2021-07-13 19:53:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:46,991 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 9160 transitions. [2021-07-13 19:53:46,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 9160 transitions. [2021-07-13 19:53:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:46,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:46,994 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:47,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,195 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1419687985, now seen corresponding path program 25 times [2021-07-13 19:53:47,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:47,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853940615] [2021-07-13 19:53:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:47,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853940615] [2021-07-13 19:53:47,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853940615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578292939] [2021-07-13 19:53:47,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:47,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578292939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:47,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:47,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000485854] [2021-07-13 19:53:47,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:47,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:47,321 INFO L87 Difference]: Start difference. First operand 2159 states and 9160 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:47,492 INFO L93 Difference]: Finished difference Result 3239 states and 13025 transitions. [2021-07-13 19:53:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:47,499 INFO L225 Difference]: With dead ends: 3239 [2021-07-13 19:53:47,499 INFO L226 Difference]: Without dead ends: 3150 [2021-07-13 19:53:47,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-07-13 19:53:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2206. [2021-07-13 19:53:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.284353741496599) internal successors, (9447), 2205 states have internal predecessors, (9447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9447 transitions. [2021-07-13 19:53:47,541 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9447 transitions. Word has length 28 [2021-07-13 19:53:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:47,541 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9447 transitions. [2021-07-13 19:53:47,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9447 transitions. [2021-07-13 19:53:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:47,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:47,544 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:47,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,750 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1022624813, now seen corresponding path program 26 times [2021-07-13 19:53:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:47,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927054735] [2021-07-13 19:53:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:47,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927054735] [2021-07-13 19:53:47,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927054735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776187691] [2021-07-13 19:53:47,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:47,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776187691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:47,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300079622] [2021-07-13 19:53:47,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:47,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:47,882 INFO L87 Difference]: Start difference. First operand 2206 states and 9447 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:48,032 INFO L93 Difference]: Finished difference Result 5842 states and 23522 transitions. [2021-07-13 19:53:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:48,045 INFO L225 Difference]: With dead ends: 5842 [2021-07-13 19:53:48,045 INFO L226 Difference]: Without dead ends: 5604 [2021-07-13 19:53:48,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-07-13 19:53:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 3077. [2021-07-13 19:53:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 4.447009102730819) internal successors, (13679), 3076 states have internal predecessors, (13679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 13679 transitions. [2021-07-13 19:53:48,114 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 13679 transitions. Word has length 28 [2021-07-13 19:53:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:48,115 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 13679 transitions. [2021-07-13 19:53:48,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 13679 transitions. [2021-07-13 19:53:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:48,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:48,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:48,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:48,321 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1332519461, now seen corresponding path program 27 times [2021-07-13 19:53:48,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:48,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144170606] [2021-07-13 19:53:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:48,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:48,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144170606] [2021-07-13 19:53:48,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144170606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525443848] [2021-07-13 19:53:48,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:48,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:53:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525443848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:48,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:48,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480035216] [2021-07-13 19:53:48,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:48,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:48,435 INFO L87 Difference]: Start difference. First operand 3077 states and 13679 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:48,666 INFO L93 Difference]: Finished difference Result 5963 states and 23745 transitions. [2021-07-13 19:53:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:48,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:48,679 INFO L225 Difference]: With dead ends: 5963 [2021-07-13 19:53:48,679 INFO L226 Difference]: Without dead ends: 5804 [2021-07-13 19:53:48,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-07-13 19:53:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 2984. [2021-07-13 19:53:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 4.44217230975528) internal successors, (13251), 2983 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 13251 transitions. [2021-07-13 19:53:48,767 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 13251 transitions. Word has length 28 [2021-07-13 19:53:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:48,767 INFO L482 AbstractCegarLoop]: Abstraction has 2984 states and 13251 transitions. [2021-07-13 19:53:48,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 13251 transitions. [2021-07-13 19:53:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:48,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:48,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:48,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 19:53:48,973 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:48,973 INFO L82 PathProgramCache]: Analyzing trace with hash 80086205, now seen corresponding path program 28 times [2021-07-13 19:53:48,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:48,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816016055] [2021-07-13 19:53:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:48,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816016055] [2021-07-13 19:53:48,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816016055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146469602] [2021-07-13 19:53:48,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:49,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146469602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:49,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:53:49,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150653643] [2021-07-13 19:53:49,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:49,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:49,087 INFO L87 Difference]: Start difference. First operand 2984 states and 13251 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:49,338 INFO L93 Difference]: Finished difference Result 5675 states and 22909 transitions. [2021-07-13 19:53:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:49,357 INFO L225 Difference]: With dead ends: 5675 [2021-07-13 19:53:49,357 INFO L226 Difference]: Without dead ends: 5594 [2021-07-13 19:53:49,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2021-07-13 19:53:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 3213. [2021-07-13 19:53:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 4.452988792029888) internal successors, (14303), 3212 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 14303 transitions. [2021-07-13 19:53:49,437 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 14303 transitions. Word has length 28 [2021-07-13 19:53:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:49,437 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 14303 transitions. [2021-07-13 19:53:49,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 14303 transitions. [2021-07-13 19:53:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:49,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:49,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:49,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 19:53:49,644 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash -156949847, now seen corresponding path program 29 times [2021-07-13 19:53:49,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:49,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658522333] [2021-07-13 19:53:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:49,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658522333] [2021-07-13 19:53:49,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658522333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064558821] [2021-07-13 19:53:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:49,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:49,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:49,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064558821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:49,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:49,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:49,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043481108] [2021-07-13 19:53:49,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:49,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:49,769 INFO L87 Difference]: Start difference. First operand 3213 states and 14303 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:49,955 INFO L93 Difference]: Finished difference Result 5452 states and 22207 transitions. [2021-07-13 19:53:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:49,968 INFO L225 Difference]: With dead ends: 5452 [2021-07-13 19:53:49,968 INFO L226 Difference]: Without dead ends: 5364 [2021-07-13 19:53:49,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-07-13 19:53:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 3341. [2021-07-13 19:53:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 4.440718562874252) internal successors, (14832), 3340 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 14832 transitions. [2021-07-13 19:53:50,043 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 14832 transitions. Word has length 28 [2021-07-13 19:53:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:50,044 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 14832 transitions. [2021-07-13 19:53:50,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 14832 transitions. [2021-07-13 19:53:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:50,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:50,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:50,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:53:50,262 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:50,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1316063575, now seen corresponding path program 30 times [2021-07-13 19:53:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:50,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746564956] [2021-07-13 19:53:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:50,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746564956] [2021-07-13 19:53:50,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746564956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856795667] [2021-07-13 19:53:50,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:50,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856795667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:50,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:50,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363968107] [2021-07-13 19:53:50,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:50,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:50,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:50,366 INFO L87 Difference]: Start difference. First operand 3341 states and 14832 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:50,498 INFO L93 Difference]: Finished difference Result 4165 states and 17900 transitions. [2021-07-13 19:53:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:50,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:50,507 INFO L225 Difference]: With dead ends: 4165 [2021-07-13 19:53:50,508 INFO L226 Difference]: Without dead ends: 4165 [2021-07-13 19:53:50,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-07-13 19:53:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3293. [2021-07-13 19:53:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 4.427703523693803) internal successors, (14576), 3292 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 14576 transitions. [2021-07-13 19:53:50,587 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 14576 transitions. Word has length 28 [2021-07-13 19:53:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:50,587 INFO L482 AbstractCegarLoop]: Abstraction has 3293 states and 14576 transitions. [2021-07-13 19:53:50,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 14576 transitions. [2021-07-13 19:53:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:50,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:50,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:50,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 19:53:50,794 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:50,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1040039817, now seen corresponding path program 31 times [2021-07-13 19:53:50,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:50,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726075764] [2021-07-13 19:53:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726075764] [2021-07-13 19:53:50,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726075764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372452872] [2021-07-13 19:53:50,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:50,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372452872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:50,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:50,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:50,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329701347] [2021-07-13 19:53:50,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:50,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:50,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:50,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:50,918 INFO L87 Difference]: Start difference. First operand 3293 states and 14576 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:51,153 INFO L93 Difference]: Finished difference Result 6120 states and 24890 transitions. [2021-07-13 19:53:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:51,167 INFO L225 Difference]: With dead ends: 6120 [2021-07-13 19:53:51,167 INFO L226 Difference]: Without dead ends: 6031 [2021-07-13 19:53:51,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:53:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-07-13 19:53:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 3429. [2021-07-13 19:53:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 4.4518669778296385) internal successors, (15261), 3428 states have internal predecessors, (15261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 15261 transitions. [2021-07-13 19:53:51,250 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 15261 transitions. Word has length 28 [2021-07-13 19:53:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:51,251 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 15261 transitions. [2021-07-13 19:53:51,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 15261 transitions. [2021-07-13 19:53:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:51,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:51,257 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:51,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:51,477 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:51,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1402272981, now seen corresponding path program 32 times [2021-07-13 19:53:51,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:51,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226454348] [2021-07-13 19:53:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:51,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226454348] [2021-07-13 19:53:51,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226454348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426465734] [2021-07-13 19:53:51,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:51,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426465734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:51,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:51,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:51,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571072101] [2021-07-13 19:53:51,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:51,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:51,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:51,578 INFO L87 Difference]: Start difference. First operand 3429 states and 15261 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:51,721 INFO L93 Difference]: Finished difference Result 5654 states and 23169 transitions. [2021-07-13 19:53:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:51,736 INFO L225 Difference]: With dead ends: 5654 [2021-07-13 19:53:51,756 INFO L226 Difference]: Without dead ends: 5416 [2021-07-13 19:53:51,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2021-07-13 19:53:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 3560. [2021-07-13 19:53:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 4.421747681933128) internal successors, (15737), 3559 states have internal predecessors, (15737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 15737 transitions. [2021-07-13 19:53:51,835 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 15737 transitions. Word has length 28 [2021-07-13 19:53:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:51,835 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 15737 transitions. [2021-07-13 19:53:51,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 15737 transitions. [2021-07-13 19:53:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:51,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:51,842 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:52,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,057 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash -952871293, now seen corresponding path program 33 times [2021-07-13 19:53:52,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:52,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748162873] [2021-07-13 19:53:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:52,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748162873] [2021-07-13 19:53:52,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748162873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945476769] [2021-07-13 19:53:52,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:52,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945476769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:52,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:52,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425055183] [2021-07-13 19:53:52,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:52,169 INFO L87 Difference]: Start difference. First operand 3560 states and 15737 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:52,368 INFO L93 Difference]: Finished difference Result 4955 states and 20688 transitions. [2021-07-13 19:53:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:52,380 INFO L225 Difference]: With dead ends: 4955 [2021-07-13 19:53:52,380 INFO L226 Difference]: Without dead ends: 4857 [2021-07-13 19:53:52,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-07-13 19:53:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 3479. [2021-07-13 19:53:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 4.4399079930994825) internal successors, (15442), 3478 states have internal predecessors, (15442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 15442 transitions. [2021-07-13 19:53:52,450 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 15442 transitions. Word has length 28 [2021-07-13 19:53:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:52,450 INFO L482 AbstractCegarLoop]: Abstraction has 3479 states and 15442 transitions. [2021-07-13 19:53:52,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 15442 transitions. [2021-07-13 19:53:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:52,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:52,456 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:52,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,657 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -121098667, now seen corresponding path program 34 times [2021-07-13 19:53:52,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:52,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358683242] [2021-07-13 19:53:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:52,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358683242] [2021-07-13 19:53:52,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358683242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457758362] [2021-07-13 19:53:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:52,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:52,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:52,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457758362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:52,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:52,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:52,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41551517] [2021-07-13 19:53:52,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:52,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:52,773 INFO L87 Difference]: Start difference. First operand 3479 states and 15442 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:52,932 INFO L93 Difference]: Finished difference Result 5688 states and 23360 transitions. [2021-07-13 19:53:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:53:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:52,946 INFO L225 Difference]: With dead ends: 5688 [2021-07-13 19:53:52,946 INFO L226 Difference]: Without dead ends: 5374 [2021-07-13 19:53:52,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-07-13 19:53:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3228. [2021-07-13 19:53:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 4.4465447784319805) internal successors, (14349), 3227 states have internal predecessors, (14349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 14349 transitions. [2021-07-13 19:53:53,019 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 14349 transitions. Word has length 28 [2021-07-13 19:53:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:53,019 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 14349 transitions. [2021-07-13 19:53:53,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 14349 transitions. [2021-07-13 19:53:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:53,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:53,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:53,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,225 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:53,226 INFO L82 PathProgramCache]: Analyzing trace with hash 73354585, now seen corresponding path program 35 times [2021-07-13 19:53:53,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:53,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295628363] [2021-07-13 19:53:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:53,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295628363] [2021-07-13 19:53:53,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295628363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705051360] [2021-07-13 19:53:53,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:53:53,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705051360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:53,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:53:53,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014385704] [2021-07-13 19:53:53,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:53:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:53:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:53:53,319 INFO L87 Difference]: Start difference. First operand 3228 states and 14349 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:53,425 INFO L93 Difference]: Finished difference Result 3905 states and 17063 transitions. [2021-07-13 19:53:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:53:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:53,435 INFO L225 Difference]: With dead ends: 3905 [2021-07-13 19:53:53,435 INFO L226 Difference]: Without dead ends: 3862 [2021-07-13 19:53:53,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:53:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-07-13 19:53:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3217. [2021-07-13 19:53:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 4.453980099502488) internal successors, (14324), 3216 states have internal predecessors, (14324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 14324 transitions. [2021-07-13 19:53:53,493 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 14324 transitions. Word has length 28 [2021-07-13 19:53:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:53,493 INFO L482 AbstractCegarLoop]: Abstraction has 3217 states and 14324 transitions. [2021-07-13 19:53:53,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 14324 transitions. [2021-07-13 19:53:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:53,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:53,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:53,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,699 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:53,700 INFO L82 PathProgramCache]: Analyzing trace with hash -161141625, now seen corresponding path program 36 times [2021-07-13 19:53:53,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:53,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915644296] [2021-07-13 19:53:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915644296] [2021-07-13 19:53:53,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915644296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084870074] [2021-07-13 19:53:53,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:53,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:53:53,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:53,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084870074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:53,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:53,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:53:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961354855] [2021-07-13 19:53:53,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:53:53,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:53:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:53:53,795 INFO L87 Difference]: Start difference. First operand 3217 states and 14324 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:53,881 INFO L93 Difference]: Finished difference Result 4261 states and 18540 transitions. [2021-07-13 19:53:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:53:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:53,896 INFO L225 Difference]: With dead ends: 4261 [2021-07-13 19:53:53,897 INFO L226 Difference]: Without dead ends: 4261 [2021-07-13 19:53:53,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:53:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-07-13 19:53:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3247. [2021-07-13 19:53:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 4.457486136783734) internal successors, (14469), 3246 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 14469 transitions. [2021-07-13 19:53:53,995 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 14469 transitions. Word has length 28 [2021-07-13 19:53:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:53,995 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 14469 transitions. [2021-07-13 19:53:53,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 14469 transitions. [2021-07-13 19:53:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:54,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:54,002 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:54,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-07-13 19:53:54,202 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:54,203 INFO L82 PathProgramCache]: Analyzing trace with hash -544432577, now seen corresponding path program 37 times [2021-07-13 19:53:54,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:54,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958151645] [2021-07-13 19:53:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:54,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958151645] [2021-07-13 19:53:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958151645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522280835] [2021-07-13 19:53:54,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:54,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522280835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:54,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:53:54,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797410958] [2021-07-13 19:53:54,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:54,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:54,310 INFO L87 Difference]: Start difference. First operand 3247 states and 14469 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:54,545 INFO L93 Difference]: Finished difference Result 5371 states and 22050 transitions. [2021-07-13 19:53:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:53:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:54,558 INFO L225 Difference]: With dead ends: 5371 [2021-07-13 19:53:54,558 INFO L226 Difference]: Without dead ends: 5194 [2021-07-13 19:53:54,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:53:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-07-13 19:53:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3332. [2021-07-13 19:53:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 4.473431401981387) internal successors, (14901), 3331 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 14901 transitions. [2021-07-13 19:53:54,637 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 14901 transitions. Word has length 28 [2021-07-13 19:53:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:54,637 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 14901 transitions. [2021-07-13 19:53:54,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 14901 transitions. [2021-07-13 19:53:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:54,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:54,645 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:54,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:53:54,857 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1703546305, now seen corresponding path program 38 times [2021-07-13 19:53:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:54,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446929242] [2021-07-13 19:53:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:54,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446929242] [2021-07-13 19:53:54,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446929242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678415618] [2021-07-13 19:53:54,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:54,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678415618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:54,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:54,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:53:54,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96526957] [2021-07-13 19:53:54,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:54,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:54,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:54,968 INFO L87 Difference]: Start difference. First operand 3332 states and 14901 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:55,133 INFO L93 Difference]: Finished difference Result 4983 states and 20920 transitions. [2021-07-13 19:53:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:53:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:55,145 INFO L225 Difference]: With dead ends: 4983 [2021-07-13 19:53:55,145 INFO L226 Difference]: Without dead ends: 4684 [2021-07-13 19:53:55,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-07-13 19:53:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 3540. [2021-07-13 19:53:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.495620231703871) internal successors, (15910), 3539 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 15910 transitions. [2021-07-13 19:53:55,257 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 15910 transitions. Word has length 28 [2021-07-13 19:53:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:55,257 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 15910 transitions. [2021-07-13 19:53:55,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 15910 transitions. [2021-07-13 19:53:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:55,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:55,264 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:55,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 19:53:55,465 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:55,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1340354023, now seen corresponding path program 39 times [2021-07-13 19:53:55,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:55,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445287806] [2021-07-13 19:53:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:55,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445287806] [2021-07-13 19:53:55,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445287806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982121301] [2021-07-13 19:53:55,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:55,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:55,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:55,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982121301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:55,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:55,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:55,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620319052] [2021-07-13 19:53:55,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:55,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:55,578 INFO L87 Difference]: Start difference. First operand 3540 states and 15910 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:55,776 INFO L93 Difference]: Finished difference Result 4609 states and 19684 transitions. [2021-07-13 19:53:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:55,787 INFO L225 Difference]: With dead ends: 4609 [2021-07-13 19:53:55,787 INFO L226 Difference]: Without dead ends: 4511 [2021-07-13 19:53:55,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:53:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-07-13 19:53:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3315. [2021-07-13 19:53:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 4.492757996378998) internal successors, (14889), 3314 states have internal predecessors, (14889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 14889 transitions. [2021-07-13 19:53:55,849 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 14889 transitions. Word has length 28 [2021-07-13 19:53:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:55,849 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 14889 transitions. [2021-07-13 19:53:55,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 14889 transitions. [2021-07-13 19:53:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:55,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:55,855 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:56,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 19:53:56,056 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash -508581397, now seen corresponding path program 40 times [2021-07-13 19:53:56,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:56,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740114024] [2021-07-13 19:53:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740114024] [2021-07-13 19:53:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740114024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987459457] [2021-07-13 19:53:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:56,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:56,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:56,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987459457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:56,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:56,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704466230] [2021-07-13 19:53:56,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:56,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:56,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:56,156 INFO L87 Difference]: Start difference. First operand 3315 states and 14889 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:56,311 INFO L93 Difference]: Finished difference Result 6217 states and 25682 transitions. [2021-07-13 19:53:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:56,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:56,325 INFO L225 Difference]: With dead ends: 6217 [2021-07-13 19:53:56,325 INFO L226 Difference]: Without dead ends: 5965 [2021-07-13 19:53:56,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-07-13 19:53:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 3606. [2021-07-13 19:53:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 4.471844660194175) internal successors, (16121), 3605 states have internal predecessors, (16121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 16121 transitions. [2021-07-13 19:53:56,433 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 16121 transitions. Word has length 28 [2021-07-13 19:53:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:56,433 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 16121 transitions. [2021-07-13 19:53:56,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 16121 transitions. [2021-07-13 19:53:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:56,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:56,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:56,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 19:53:56,640 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 436881771, now seen corresponding path program 41 times [2021-07-13 19:53:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:56,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976463142] [2021-07-13 19:53:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976463142] [2021-07-13 19:53:56,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976463142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378560551] [2021-07-13 19:53:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:56,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:53:56,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378560551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:56,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:56,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484813585] [2021-07-13 19:53:56,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:56,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:56,752 INFO L87 Difference]: Start difference. First operand 3606 states and 16121 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:56,957 INFO L93 Difference]: Finished difference Result 5105 states and 21497 transitions. [2021-07-13 19:53:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:56,968 INFO L225 Difference]: With dead ends: 5105 [2021-07-13 19:53:56,968 INFO L226 Difference]: Without dead ends: 5016 [2021-07-13 19:53:56,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2021-07-13 19:53:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 3555. [2021-07-13 19:53:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 4.498030388294879) internal successors, (15986), 3554 states have internal predecessors, (15986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 15986 transitions. [2021-07-13 19:53:57,034 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 15986 transitions. Word has length 28 [2021-07-13 19:53:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:57,035 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 15986 transitions. [2021-07-13 19:53:57,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 15986 transitions. [2021-07-13 19:53:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:57,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:57,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:57,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-13 19:53:57,242 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1415772727, now seen corresponding path program 42 times [2021-07-13 19:53:57,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:57,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081314836] [2021-07-13 19:53:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:57,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081314836] [2021-07-13 19:53:57,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081314836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583435398] [2021-07-13 19:53:57,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:57,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:53:57,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:57,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:57,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583435398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:57,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:57,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:57,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996653628] [2021-07-13 19:53:57,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:57,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:57,349 INFO L87 Difference]: Start difference. First operand 3555 states and 15986 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:57,498 INFO L93 Difference]: Finished difference Result 6625 states and 28035 transitions. [2021-07-13 19:53:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:53:57,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:57,513 INFO L225 Difference]: With dead ends: 6625 [2021-07-13 19:53:57,513 INFO L226 Difference]: Without dead ends: 6387 [2021-07-13 19:53:57,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:53:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2021-07-13 19:53:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 4277. [2021-07-13 19:53:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4276 states have (on average 4.543966323666979) internal successors, (19430), 4276 states have internal predecessors, (19430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 19430 transitions. [2021-07-13 19:53:57,603 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 19430 transitions. Word has length 28 [2021-07-13 19:53:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:57,603 INFO L482 AbstractCegarLoop]: Abstraction has 4277 states and 19430 transitions. [2021-07-13 19:53:57,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 19430 transitions. [2021-07-13 19:53:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:57,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:57,636 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:57,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:57,846 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:57,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:57,846 INFO L82 PathProgramCache]: Analyzing trace with hash 524050295, now seen corresponding path program 43 times [2021-07-13 19:53:57,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:57,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342866922] [2021-07-13 19:53:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:57,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:57,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342866922] [2021-07-13 19:53:57,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342866922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:57,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644637014] [2021-07-13 19:53:57,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:57,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644637014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:57,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:57,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:53:57,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068233401] [2021-07-13 19:53:57,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:57,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:57,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:57,947 INFO L87 Difference]: Start difference. First operand 4277 states and 19430 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:58,162 INFO L93 Difference]: Finished difference Result 6394 states and 27162 transitions. [2021-07-13 19:53:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:58,177 INFO L225 Difference]: With dead ends: 6394 [2021-07-13 19:53:58,177 INFO L226 Difference]: Without dead ends: 6243 [2021-07-13 19:53:58,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-07-13 19:53:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3807. [2021-07-13 19:53:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 4.512348922753547) internal successors, (17174), 3806 states have internal predecessors, (17174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 17174 transitions. [2021-07-13 19:53:58,264 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 17174 transitions. Word has length 28 [2021-07-13 19:53:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:58,264 INFO L482 AbstractCegarLoop]: Abstraction has 3807 states and 17174 transitions. [2021-07-13 19:53:58,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 17174 transitions. [2021-07-13 19:53:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:58,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:58,271 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:58,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,472 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1936655961, now seen corresponding path program 44 times [2021-07-13 19:53:58,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:58,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237821355] [2021-07-13 19:53:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:58,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237821355] [2021-07-13 19:53:58,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237821355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949796031] [2021-07-13 19:53:58,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:58,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:58,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949796031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:58,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:58,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:53:58,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181475740] [2021-07-13 19:53:58,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:58,578 INFO L87 Difference]: Start difference. First operand 3807 states and 17174 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:58,777 INFO L93 Difference]: Finished difference Result 5996 states and 25523 transitions. [2021-07-13 19:53:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:58,791 INFO L225 Difference]: With dead ends: 5996 [2021-07-13 19:53:58,791 INFO L226 Difference]: Without dead ends: 5915 [2021-07-13 19:53:58,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:53:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-07-13 19:53:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3582. [2021-07-13 19:53:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 4.499301870985758) internal successors, (16112), 3581 states have internal predecessors, (16112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 16112 transitions. [2021-07-13 19:53:58,871 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 16112 transitions. Word has length 28 [2021-07-13 19:53:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:58,871 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 16112 transitions. [2021-07-13 19:53:58,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 16112 transitions. [2021-07-13 19:53:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:58,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:58,902 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:59,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,103 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1708748389, now seen corresponding path program 45 times [2021-07-13 19:53:59,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:59,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078453090] [2021-07-13 19:53:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078453090] [2021-07-13 19:53:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078453090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022013330] [2021-07-13 19:53:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:53:59,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022013330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:59,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:59,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118831800] [2021-07-13 19:53:59,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:59,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:59,204 INFO L87 Difference]: Start difference. First operand 3582 states and 16112 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:59,410 INFO L93 Difference]: Finished difference Result 6117 states and 25799 transitions. [2021-07-13 19:53:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:53:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:59,425 INFO L225 Difference]: With dead ends: 6117 [2021-07-13 19:53:59,425 INFO L226 Difference]: Without dead ends: 6028 [2021-07-13 19:53:59,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:53:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-07-13 19:53:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3578. [2021-07-13 19:53:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 4.48616158792284) internal successors, (16047), 3577 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 16047 transitions. [2021-07-13 19:53:59,504 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 16047 transitions. Word has length 28 [2021-07-13 19:53:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:59,504 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 16047 transitions. [2021-07-13 19:53:59,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 16047 transitions. [2021-07-13 19:53:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:53:59,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:59,510 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:59,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,711 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash 733564409, now seen corresponding path program 46 times [2021-07-13 19:53:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501025253] [2021-07-13 19:53:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:59,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501025253] [2021-07-13 19:53:59,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501025253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437778622] [2021-07-13 19:53:59,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:59,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:53:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:59,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:53:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:59,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437778622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:59,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:59,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:53:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984524163] [2021-07-13 19:53:59,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:59,812 INFO L87 Difference]: Start difference. First operand 3578 states and 16047 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:59,978 INFO L93 Difference]: Finished difference Result 7695 states and 32562 transitions. [2021-07-13 19:53:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:53:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:53:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:59,997 INFO L225 Difference]: With dead ends: 7695 [2021-07-13 19:53:59,997 INFO L226 Difference]: Without dead ends: 7457 [2021-07-13 19:53:59,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:54:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-07-13 19:54:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 3898. [2021-07-13 19:54:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3897 states have (on average 4.497818835001283) internal successors, (17528), 3897 states have internal predecessors, (17528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 17528 transitions. [2021-07-13 19:54:00,129 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 17528 transitions. Word has length 28 [2021-07-13 19:54:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:00,129 INFO L482 AbstractCegarLoop]: Abstraction has 3898 states and 17528 transitions. [2021-07-13 19:54:00,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 17528 transitions. [2021-07-13 19:54:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:54:00,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:00,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:00,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:00,339 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1621579865, now seen corresponding path program 47 times [2021-07-13 19:54:00,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:00,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957099109] [2021-07-13 19:54:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:00,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957099109] [2021-07-13 19:54:00,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957099109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:00,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588509543] [2021-07-13 19:54:00,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:00,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:00,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:00,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588509543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:00,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:00,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:54:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004849310] [2021-07-13 19:54:00,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:54:00,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:54:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:00,453 INFO L87 Difference]: Start difference. First operand 3898 states and 17528 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:00,710 INFO L93 Difference]: Finished difference Result 7529 states and 31905 transitions. [2021-07-13 19:54:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:54:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:54:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:00,731 INFO L225 Difference]: With dead ends: 7529 [2021-07-13 19:54:00,731 INFO L226 Difference]: Without dead ends: 7378 [2021-07-13 19:54:00,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:54:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-07-13 19:54:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3667. [2021-07-13 19:54:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3666 states have (on average 4.480087288597927) internal successors, (16424), 3666 states have internal predecessors, (16424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 16424 transitions. [2021-07-13 19:54:00,827 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 16424 transitions. Word has length 28 [2021-07-13 19:54:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:00,827 INFO L482 AbstractCegarLoop]: Abstraction has 3667 states and 16424 transitions. [2021-07-13 19:54:00,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 16424 transitions. [2021-07-13 19:54:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:54:00,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:00,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:01,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:01,034 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash -789807239, now seen corresponding path program 48 times [2021-07-13 19:54:01,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:01,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433944734] [2021-07-13 19:54:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433944734] [2021-07-13 19:54:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433944734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145161708] [2021-07-13 19:54:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:01,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145161708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:01,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:54:01,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54372255] [2021-07-13 19:54:01,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:54:01,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:01,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:54:01,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:01,133 INFO L87 Difference]: Start difference. First operand 3667 states and 16424 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:01,284 INFO L93 Difference]: Finished difference Result 5684 states and 23777 transitions. [2021-07-13 19:54:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:54:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:54:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:01,297 INFO L225 Difference]: With dead ends: 5684 [2021-07-13 19:54:01,297 INFO L226 Difference]: Without dead ends: 5684 [2021-07-13 19:54:01,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:54:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-07-13 19:54:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 3830. [2021-07-13 19:54:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.469051971794202) internal successors, (17112), 3829 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 17112 transitions. [2021-07-13 19:54:01,372 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 17112 transitions. Word has length 28 [2021-07-13 19:54:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:01,372 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 17112 transitions. [2021-07-13 19:54:01,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 17112 transitions. [2021-07-13 19:54:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:54:01,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:01,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:01,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-13 19:54:01,579 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -208974199, now seen corresponding path program 49 times [2021-07-13 19:54:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:01,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901407268] [2021-07-13 19:54:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:01,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901407268] [2021-07-13 19:54:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901407268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74587782] [2021-07-13 19:54:01,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74587782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:01,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:01,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:54:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944446982] [2021-07-13 19:54:01,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:54:01,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:01,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:54:01,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:54:01,680 INFO L87 Difference]: Start difference. First operand 3830 states and 17112 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:01,890 INFO L93 Difference]: Finished difference Result 5383 states and 22901 transitions. [2021-07-13 19:54:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:54:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:54:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:01,902 INFO L225 Difference]: With dead ends: 5383 [2021-07-13 19:54:01,903 INFO L226 Difference]: Without dead ends: 5301 [2021-07-13 19:54:01,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:54:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-07-13 19:54:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3809. [2021-07-13 19:54:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 4.473214285714286) internal successors, (17034), 3808 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 17034 transitions. [2021-07-13 19:54:01,975 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 17034 transitions. Word has length 28 [2021-07-13 19:54:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:01,975 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 17034 transitions. [2021-07-13 19:54:01,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 17034 transitions. [2021-07-13 19:54:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:54:01,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:01,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:02,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 19:54:02,183 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 23729685, now seen corresponding path program 50 times [2021-07-13 19:54:02,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:02,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501410444] [2021-07-13 19:54:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501410444] [2021-07-13 19:54:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501410444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605457369] [2021-07-13 19:54:02,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:02,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:02,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:02,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605457369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:02,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:54:02,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173175912] [2021-07-13 19:54:02,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:54:02,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:54:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:54:02,277 INFO L87 Difference]: Start difference. First operand 3809 states and 17034 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:02,366 INFO L93 Difference]: Finished difference Result 4345 states and 19174 transitions. [2021-07-13 19:54:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:54:02,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:54:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:02,377 INFO L225 Difference]: With dead ends: 4345 [2021-07-13 19:54:02,377 INFO L226 Difference]: Without dead ends: 4282 [2021-07-13 19:54:02,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:54:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-07-13 19:54:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3786. [2021-07-13 19:54:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.484808454425363) internal successors, (16975), 3785 states have internal predecessors, (16975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 16975 transitions. [2021-07-13 19:54:02,442 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 16975 transitions. Word has length 28 [2021-07-13 19:54:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:02,442 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 16975 transitions. [2021-07-13 19:54:02,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 16975 transitions. [2021-07-13 19:54:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:54:02,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:02,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:02,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 19:54:02,665 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash 881575195, now seen corresponding path program 51 times [2021-07-13 19:54:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866285247] [2021-07-13 19:54:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:02,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866285247] [2021-07-13 19:54:02,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866285247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141013742] [2021-07-13 19:54:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:02,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:02,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:54:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141013742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:02,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:02,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:54:02,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129402725] [2021-07-13 19:54:02,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:54:02,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:54:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:54:02,760 INFO L87 Difference]: Start difference. First operand 3786 states and 16975 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:02,854 INFO L93 Difference]: Finished difference Result 4570 states and 20136 transitions. [2021-07-13 19:54:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:54:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:54:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:02,865 INFO L225 Difference]: With dead ends: 4570 [2021-07-13 19:54:02,865 INFO L226 Difference]: Without dead ends: 4570 [2021-07-13 19:54:02,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:54:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2021-07-13 19:54:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 3804. [2021-07-13 19:54:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.494083618196161) internal successors, (17091), 3803 states have internal predecessors, (17091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 17091 transitions. [2021-07-13 19:54:02,931 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 17091 transitions. Word has length 28 [2021-07-13 19:54:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:02,931 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 17091 transitions. [2021-07-13 19:54:02,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 17091 transitions. [2021-07-13 19:54:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:02,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:02,938 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:03,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:03,140 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:03,140 INFO L82 PathProgramCache]: Analyzing trace with hash -125713404, now seen corresponding path program 52 times [2021-07-13 19:54:03,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:03,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959359145] [2021-07-13 19:54:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:03,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959359145] [2021-07-13 19:54:03,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959359145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667357190] [2021-07-13 19:54:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:03,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:03,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:03,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:03,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:03,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:03,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:03,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:54:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667357190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:03,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:03,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:54:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599591643] [2021-07-13 19:54:03,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:03,584 INFO L87 Difference]: Start difference. First operand 3804 states and 17091 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:04,727 INFO L93 Difference]: Finished difference Result 5745 states and 25057 transitions. [2021-07-13 19:54:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:54:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:04,741 INFO L225 Difference]: With dead ends: 5745 [2021-07-13 19:54:04,741 INFO L226 Difference]: Without dead ends: 5664 [2021-07-13 19:54:04,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 776.9ms TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:54:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-07-13 19:54:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 3903. [2021-07-13 19:54:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.478728856996412) internal successors, (17476), 3902 states have internal predecessors, (17476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 17476 transitions. [2021-07-13 19:54:04,820 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 17476 transitions. Word has length 30 [2021-07-13 19:54:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:04,820 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 17476 transitions. [2021-07-13 19:54:04,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 17476 transitions. [2021-07-13 19:54:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:04,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:04,827 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:05,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-07-13 19:54:05,033 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1179025990, now seen corresponding path program 1 times [2021-07-13 19:54:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:05,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337524013] [2021-07-13 19:54:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:05,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337524013] [2021-07-13 19:54:05,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337524013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996780243] [2021-07-13 19:54:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:05,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:05,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:05,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:54:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:05,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996780243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:05,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:05,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:54:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030989371] [2021-07-13 19:54:05,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:05,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:05,452 INFO L87 Difference]: Start difference. First operand 3903 states and 17476 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:06,619 INFO L93 Difference]: Finished difference Result 5395 states and 23651 transitions. [2021-07-13 19:54:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:54:06,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:06,631 INFO L225 Difference]: With dead ends: 5395 [2021-07-13 19:54:06,632 INFO L226 Difference]: Without dead ends: 5314 [2021-07-13 19:54:06,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:54:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2021-07-13 19:54:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3889. [2021-07-13 19:54:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.484310699588478) internal successors, (17435), 3888 states have internal predecessors, (17435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 17435 transitions. [2021-07-13 19:54:06,704 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 17435 transitions. Word has length 30 [2021-07-13 19:54:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:06,704 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 17435 transitions. [2021-07-13 19:54:06,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 17435 transitions. [2021-07-13 19:54:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:06,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:06,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:06,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:06,912 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 523971232, now seen corresponding path program 2 times [2021-07-13 19:54:06,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:06,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088865385] [2021-07-13 19:54:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:07,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:07,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088865385] [2021-07-13 19:54:07,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088865385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813346811] [2021-07-13 19:54:07,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:07,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:07,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:07,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:07,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:07,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:07,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-07-13 19:54:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:07,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813346811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:07,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:07,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:54:07,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091072526] [2021-07-13 19:54:07,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:54:07,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:07,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:54:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:54:07,421 INFO L87 Difference]: Start difference. First operand 3889 states and 17435 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:08,679 INFO L93 Difference]: Finished difference Result 5211 states and 22782 transitions. [2021-07-13 19:54:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:54:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:08,691 INFO L225 Difference]: With dead ends: 5211 [2021-07-13 19:54:08,691 INFO L226 Difference]: Without dead ends: 5130 [2021-07-13 19:54:08,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 910.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:54:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-07-13 19:54:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 3899. [2021-07-13 19:54:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.482555156490508) internal successors, (17473), 3898 states have internal predecessors, (17473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 17473 transitions. [2021-07-13 19:54:08,766 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 17473 transitions. Word has length 30 [2021-07-13 19:54:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:08,767 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 17473 transitions. [2021-07-13 19:54:08,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 17473 transitions. [2021-07-13 19:54:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:08,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:08,774 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:08,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:08,974 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash 17624966, now seen corresponding path program 3 times [2021-07-13 19:54:08,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:08,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016600973] [2021-07-13 19:54:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:09,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016600973] [2021-07-13 19:54:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016600973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022340974] [2021-07-13 19:54:09,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:09,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:09,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:09,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:09,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:09,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:09,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:09,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:09,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-07-13 19:54:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:09,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022340974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:09,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:09,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:54:09,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102252463] [2021-07-13 19:54:09,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:54:09,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:09,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:54:09,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:54:09,394 INFO L87 Difference]: Start difference. First operand 3899 states and 17473 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:10,691 INFO L93 Difference]: Finished difference Result 5249 states and 22919 transitions. [2021-07-13 19:54:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:54:10,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:10,704 INFO L225 Difference]: With dead ends: 5249 [2021-07-13 19:54:10,705 INFO L226 Difference]: Without dead ends: 5176 [2021-07-13 19:54:10,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 845.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-07-13 19:54:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3875. [2021-07-13 19:54:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.489416623644812) internal successors, (17392), 3874 states have internal predecessors, (17392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17392 transitions. [2021-07-13 19:54:10,779 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17392 transitions. Word has length 30 [2021-07-13 19:54:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:10,779 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17392 transitions. [2021-07-13 19:54:10,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17392 transitions. [2021-07-13 19:54:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:10,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:10,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:10,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:10,987 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2020102972, now seen corresponding path program 21 times [2021-07-13 19:54:10,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:10,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464207077] [2021-07-13 19:54:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:11,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464207077] [2021-07-13 19:54:11,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464207077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:11,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057355025] [2021-07-13 19:54:11,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:11,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:11,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:11,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:11,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:11,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 19:54:11,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,496 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 19:54:11,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:11,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 19:54:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:11,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057355025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:11,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:11,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-13 19:54:11,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330795704] [2021-07-13 19:54:11,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:54:11,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:54:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:54:11,538 INFO L87 Difference]: Start difference. First operand 3875 states and 17392 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:12,815 INFO L93 Difference]: Finished difference Result 4957 states and 21263 transitions. [2021-07-13 19:54:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:12,827 INFO L225 Difference]: With dead ends: 4957 [2021-07-13 19:54:12,827 INFO L226 Difference]: Without dead ends: 4795 [2021-07-13 19:54:12,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 814.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:54:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-07-13 19:54:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3949. [2021-07-13 19:54:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.4693515704154) internal successors, (17645), 3948 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 17645 transitions. [2021-07-13 19:54:12,898 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 17645 transitions. Word has length 30 [2021-07-13 19:54:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:12,898 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 17645 transitions. [2021-07-13 19:54:12,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 17645 transitions. [2021-07-13 19:54:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:12,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:12,906 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:13,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,106 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash -334675676, now seen corresponding path program 4 times [2021-07-13 19:54:13,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:13,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198586322] [2021-07-13 19:54:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198586322] [2021-07-13 19:54:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198586322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612101858] [2021-07-13 19:54:13,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:13,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:13,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:13,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:13,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:13,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:54:13,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:13,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:13,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 19:54:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:13,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612101858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:13,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:13,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 19:54:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563789445] [2021-07-13 19:54:13,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:13,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:13,608 INFO L87 Difference]: Start difference. First operand 3949 states and 17645 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:14,633 INFO L93 Difference]: Finished difference Result 4626 states and 20349 transitions. [2021-07-13 19:54:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:54:14,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:14,644 INFO L225 Difference]: With dead ends: 4626 [2021-07-13 19:54:14,645 INFO L226 Difference]: Without dead ends: 4553 [2021-07-13 19:54:14,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:54:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-07-13 19:54:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3969. [2021-07-13 19:54:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3968 states have (on average 4.465977822580645) internal successors, (17721), 3968 states have internal predecessors, (17721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 17721 transitions. [2021-07-13 19:54:14,716 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 17721 transitions. Word has length 30 [2021-07-13 19:54:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:14,716 INFO L482 AbstractCegarLoop]: Abstraction has 3969 states and 17721 transitions. [2021-07-13 19:54:14,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 17721 transitions. [2021-07-13 19:54:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:14,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:14,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:14,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:14,923 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1057468870, now seen corresponding path program 5 times [2021-07-13 19:54:14,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:14,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174428169] [2021-07-13 19:54:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:15,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:15,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174428169] [2021-07-13 19:54:15,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174428169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:15,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125316004] [2021-07-13 19:54:15,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:15,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:15,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:15,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:15,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:15,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:54:15,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:15,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:15,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:15,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 19:54:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:15,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125316004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:15,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:15,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 19:54:15,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64452065] [2021-07-13 19:54:15,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:15,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:15,403 INFO L87 Difference]: Start difference. First operand 3969 states and 17721 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:16,364 INFO L93 Difference]: Finished difference Result 4613 states and 20313 transitions. [2021-07-13 19:54:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:54:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:16,375 INFO L225 Difference]: With dead ends: 4613 [2021-07-13 19:54:16,375 INFO L226 Difference]: Without dead ends: 4532 [2021-07-13 19:54:16,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:54:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-07-13 19:54:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 3979. [2021-07-13 19:54:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-07-13 19:54:16,473 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-07-13 19:54:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:16,473 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-07-13 19:54:16,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-07-13 19:54:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:16,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:16,480 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:16,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:16,680 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 551122604, now seen corresponding path program 6 times [2021-07-13 19:54:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:16,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456093151] [2021-07-13 19:54:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:16,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:16,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456093151] [2021-07-13 19:54:16,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456093151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:16,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126626877] [2021-07-13 19:54:16,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:16,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:16,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:17,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:17,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:17,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-13 19:54:17,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:17,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:17,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:17,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-07-13 19:54:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126626877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:17,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:17,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 19:54:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916301230] [2021-07-13 19:54:17,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:54:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:54:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:54:17,218 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:18,565 INFO L93 Difference]: Finished difference Result 4720 states and 20746 transitions. [2021-07-13 19:54:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:54:18,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:18,576 INFO L225 Difference]: With dead ends: 4720 [2021-07-13 19:54:18,576 INFO L226 Difference]: Without dead ends: 4639 [2021-07-13 19:54:18,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 844.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:54:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-07-13 19:54:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3979. [2021-07-13 19:54:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-07-13 19:54:18,644 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-07-13 19:54:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:18,644 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-07-13 19:54:18,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-07-13 19:54:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:18,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:18,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:18,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:18,879 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 22 times [2021-07-13 19:54:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:18,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548874797] [2021-07-13 19:54:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:19,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548874797] [2021-07-13 19:54:19,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548874797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721561818] [2021-07-13 19:54:19,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:19,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:19,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:19,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:19,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:19,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:19,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:54:19,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:19,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:19,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 19:54:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:19,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721561818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:19,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:19,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:54:19,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818230246] [2021-07-13 19:54:19,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:19,335 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:21,283 INFO L93 Difference]: Finished difference Result 5261 states and 22917 transitions. [2021-07-13 19:54:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:54:21,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:21,315 INFO L225 Difference]: With dead ends: 5261 [2021-07-13 19:54:21,315 INFO L226 Difference]: Without dead ends: 5069 [2021-07-13 19:54:21,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1130.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:54:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-07-13 19:54:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4014. [2021-07-13 19:54:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 4.46922501868926) internal successors, (17935), 4013 states have internal predecessors, (17935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 17935 transitions. [2021-07-13 19:54:21,387 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 17935 transitions. Word has length 30 [2021-07-13 19:54:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:21,387 INFO L482 AbstractCegarLoop]: Abstraction has 4014 states and 17935 transitions. [2021-07-13 19:54:21,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 17935 transitions. [2021-07-13 19:54:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:21,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:21,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:21,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,595 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 300371958, now seen corresponding path program 7 times [2021-07-13 19:54:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:21,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698310286] [2021-07-13 19:54:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:21,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698310286] [2021-07-13 19:54:21,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698310286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893053527] [2021-07-13 19:54:21,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:21,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:22,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:54:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:54:22,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:22,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:22,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 19:54:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:22,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893053527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:22,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:22,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:54:22,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436247518] [2021-07-13 19:54:22,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:22,066 INFO L87 Difference]: Start difference. First operand 4014 states and 17935 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:23,125 INFO L93 Difference]: Finished difference Result 4912 states and 21474 transitions. [2021-07-13 19:54:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:54:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:23,142 INFO L225 Difference]: With dead ends: 4912 [2021-07-13 19:54:23,142 INFO L226 Difference]: Without dead ends: 4839 [2021-07-13 19:54:23,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 694.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:54:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-07-13 19:54:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3996. [2021-07-13 19:54:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 4.473091364205256) internal successors, (17870), 3995 states have internal predecessors, (17870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 17870 transitions. [2021-07-13 19:54:23,218 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 17870 transitions. Word has length 30 [2021-07-13 19:54:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:23,218 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 17870 transitions. [2021-07-13 19:54:23,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 17870 transitions. [2021-07-13 19:54:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:23,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:23,225 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:23,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:23,426 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2133407234, now seen corresponding path program 53 times [2021-07-13 19:54:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:23,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775827699] [2021-07-13 19:54:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:23,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:23,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775827699] [2021-07-13 19:54:23,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775827699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:23,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271530906] [2021-07-13 19:54:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:23,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:23,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:23,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:23,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:23,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:23,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:23,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:54:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271530906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:23,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:23,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:54:23,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825740214] [2021-07-13 19:54:23,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:23,847 INFO L87 Difference]: Start difference. First operand 3996 states and 17870 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:25,218 INFO L93 Difference]: Finished difference Result 6208 states and 26833 transitions. [2021-07-13 19:54:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:54:25,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:25,233 INFO L225 Difference]: With dead ends: 6208 [2021-07-13 19:54:25,233 INFO L226 Difference]: Without dead ends: 6026 [2021-07-13 19:54:25,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:54:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6026 states. [2021-07-13 19:54:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6026 to 4094. [2021-07-13 19:54:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.472269728805277) internal successors, (18305), 4093 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 18305 transitions. [2021-07-13 19:54:25,316 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 18305 transitions. Word has length 30 [2021-07-13 19:54:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:25,316 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 18305 transitions. [2021-07-13 19:54:25,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 18305 transitions. [2021-07-13 19:54:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:25,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:25,323 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:25,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-13 19:54:25,524 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:25,524 INFO L82 PathProgramCache]: Analyzing trace with hash -856820668, now seen corresponding path program 8 times [2021-07-13 19:54:25,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:25,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848539452] [2021-07-13 19:54:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:25,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:25,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848539452] [2021-07-13 19:54:25,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848539452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:25,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276298295] [2021-07-13 19:54:25,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:25,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:25,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:25,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:25,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:25,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:25,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-13 19:54:25,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:25,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:25,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:25,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-07-13 19:54:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:26,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276298295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:26,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:26,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:54:26,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584979948] [2021-07-13 19:54:26,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:26,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:26,050 INFO L87 Difference]: Start difference. First operand 4094 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:28,022 INFO L93 Difference]: Finished difference Result 5912 states and 25340 transitions. [2021-07-13 19:54:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:54:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:28,036 INFO L225 Difference]: With dead ends: 5912 [2021-07-13 19:54:28,036 INFO L226 Difference]: Without dead ends: 5564 [2021-07-13 19:54:28,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1427.6ms TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:54:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-07-13 19:54:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4100. [2021-07-13 19:54:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 4.47011466211271) internal successors, (18323), 4099 states have internal predecessors, (18323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 18323 transitions. [2021-07-13 19:54:28,134 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 18323 transitions. Word has length 30 [2021-07-13 19:54:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:28,134 INFO L482 AbstractCegarLoop]: Abstraction has 4100 states and 18323 transitions. [2021-07-13 19:54:28,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 18323 transitions. [2021-07-13 19:54:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:28,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:28,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:28,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,342 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash 950991776, now seen corresponding path program 54 times [2021-07-13 19:54:28,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:28,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859212887] [2021-07-13 19:54:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859212887] [2021-07-13 19:54:28,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859212887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519308266] [2021-07-13 19:54:28,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:28,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:54:28,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:28,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:54:28,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:28,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:28,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:28,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:54:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:28,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519308266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:28,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:28,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:54:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604454789] [2021-07-13 19:54:28,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:28,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:28,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:28,838 INFO L87 Difference]: Start difference. First operand 4100 states and 18323 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:30,471 INFO L93 Difference]: Finished difference Result 6189 states and 26443 transitions. [2021-07-13 19:54:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:54:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:30,486 INFO L225 Difference]: With dead ends: 6189 [2021-07-13 19:54:30,487 INFO L226 Difference]: Without dead ends: 5993 [2021-07-13 19:54:30,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1189.6ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:54:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-07-13 19:54:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 4143. [2021-07-13 19:54:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 4.466441332689522) internal successors, (18500), 4142 states have internal predecessors, (18500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 18500 transitions. [2021-07-13 19:54:30,566 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 18500 transitions. Word has length 30 [2021-07-13 19:54:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:30,566 INFO L482 AbstractCegarLoop]: Abstraction has 4143 states and 18500 transitions. [2021-07-13 19:54:30,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 18500 transitions. [2021-07-13 19:54:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:30,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:30,573 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:30,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 19:54:30,774 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1791203576, now seen corresponding path program 55 times [2021-07-13 19:54:30,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:30,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106868760] [2021-07-13 19:54:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:30,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106868760] [2021-07-13 19:54:30,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106868760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703846664] [2021-07-13 19:54:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:31,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:54:31,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:31,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:31,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:54:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:31,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703846664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:31,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:31,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:54:31,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018010121] [2021-07-13 19:54:31,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:31,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:31,158 INFO L87 Difference]: Start difference. First operand 4143 states and 18500 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:32,565 INFO L93 Difference]: Finished difference Result 6154 states and 26681 transitions. [2021-07-13 19:54:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:54:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:32,581 INFO L225 Difference]: With dead ends: 6154 [2021-07-13 19:54:32,581 INFO L226 Difference]: Without dead ends: 6072 [2021-07-13 19:54:32,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:54:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-07-13 19:54:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4139. [2021-07-13 19:54:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 4.467133881101982) internal successors, (18485), 4138 states have internal predecessors, (18485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 18485 transitions. [2021-07-13 19:54:32,683 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 18485 transitions. Word has length 30 [2021-07-13 19:54:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:32,683 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 18485 transitions. [2021-07-13 19:54:32,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 18485 transitions. [2021-07-13 19:54:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:32,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:32,690 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:32,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 19:54:32,891 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1215498078, now seen corresponding path program 9 times [2021-07-13 19:54:32,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:32,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237019624] [2021-07-13 19:54:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:33,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237019624] [2021-07-13 19:54:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237019624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:33,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55569641] [2021-07-13 19:54:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:33,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:54:33,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:33,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:33,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:33,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:54:33,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:33,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:33,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:33,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:54:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:33,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55569641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:33,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:33,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:54:33,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048319662] [2021-07-13 19:54:33,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:33,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:33,358 INFO L87 Difference]: Start difference. First operand 4139 states and 18485 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:35,461 INFO L93 Difference]: Finished difference Result 5882 states and 25230 transitions. [2021-07-13 19:54:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:54:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:35,474 INFO L225 Difference]: With dead ends: 5882 [2021-07-13 19:54:35,474 INFO L226 Difference]: Without dead ends: 5569 [2021-07-13 19:54:35,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1531.9ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:54:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-07-13 19:54:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4166. [2021-07-13 19:54:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 4.465546218487395) internal successors, (18599), 4165 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 18599 transitions. [2021-07-13 19:54:35,550 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 18599 transitions. Word has length 30 [2021-07-13 19:54:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:35,551 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 18599 transitions. [2021-07-13 19:54:35,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 18599 transitions. [2021-07-13 19:54:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:35,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:35,558 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:35,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-13 19:54:35,758 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:35,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882142, now seen corresponding path program 10 times [2021-07-13 19:54:35,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:35,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256753757] [2021-07-13 19:54:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:35,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256753757] [2021-07-13 19:54:35,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256753757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130116343] [2021-07-13 19:54:35,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:36,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:36,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:36,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:54:36,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:36,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:36,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:36,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:54:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130116343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:36,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:36,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:54:36,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814332124] [2021-07-13 19:54:36,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:54:36,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:36,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:54:36,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:54:36,195 INFO L87 Difference]: Start difference. First operand 4166 states and 18599 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:38,145 INFO L93 Difference]: Finished difference Result 5721 states and 24904 transitions. [2021-07-13 19:54:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:54:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:38,159 INFO L225 Difference]: With dead ends: 5721 [2021-07-13 19:54:38,159 INFO L226 Difference]: Without dead ends: 5638 [2021-07-13 19:54:38,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1474.2ms TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:54:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-07-13 19:54:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4157. [2021-07-13 19:54:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 4156 states have (on average 4.467516843118383) internal successors, (18567), 4156 states have internal predecessors, (18567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 18567 transitions. [2021-07-13 19:54:38,239 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 18567 transitions. Word has length 30 [2021-07-13 19:54:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:38,239 INFO L482 AbstractCegarLoop]: Abstraction has 4157 states and 18567 transitions. [2021-07-13 19:54:38,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 18567 transitions. [2021-07-13 19:54:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:38,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:38,246 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:38,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:38,447 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash -301373590, now seen corresponding path program 56 times [2021-07-13 19:54:38,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:38,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801547354] [2021-07-13 19:54:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:38,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801547354] [2021-07-13 19:54:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801547354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817585906] [2021-07-13 19:54:38,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:38,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:38,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:38,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:38,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:38,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-13 19:54:38,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:38,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:38,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:38,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-07-13 19:54:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:38,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817585906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:38,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:38,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:54:38,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009625617] [2021-07-13 19:54:38,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:38,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:38,903 INFO L87 Difference]: Start difference. First operand 4157 states and 18567 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:40,844 INFO L93 Difference]: Finished difference Result 6423 states and 27371 transitions. [2021-07-13 19:54:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:54:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:40,859 INFO L225 Difference]: With dead ends: 6423 [2021-07-13 19:54:40,859 INFO L226 Difference]: Without dead ends: 6097 [2021-07-13 19:54:40,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1184.3ms TimeCoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:54:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6097 states. [2021-07-13 19:54:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6097 to 4207. [2021-07-13 19:54:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 4.46528768426058) internal successors, (18781), 4206 states have internal predecessors, (18781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 18781 transitions. [2021-07-13 19:54:40,939 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 18781 transitions. Word has length 30 [2021-07-13 19:54:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:40,940 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 18781 transitions. [2021-07-13 19:54:40,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 18781 transitions. [2021-07-13 19:54:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:40,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:40,946 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:41,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,147 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1003365804, now seen corresponding path program 11 times [2021-07-13 19:54:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:41,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91186057] [2021-07-13 19:54:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:41,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91186057] [2021-07-13 19:54:41,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91186057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076591756] [2021-07-13 19:54:41,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:41,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:54:41,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:41,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:41,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:41,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:41,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:41,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:54:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076591756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:41,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:41,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:54:41,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857924028] [2021-07-13 19:54:41,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:41,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:41,534 INFO L87 Difference]: Start difference. First operand 4207 states and 18781 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:43,051 INFO L93 Difference]: Finished difference Result 6015 states and 26020 transitions. [2021-07-13 19:54:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:54:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:43,066 INFO L225 Difference]: With dead ends: 6015 [2021-07-13 19:54:43,067 INFO L226 Difference]: Without dead ends: 5833 [2021-07-13 19:54:43,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1000.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:54:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2021-07-13 19:54:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 4239. [2021-07-13 19:54:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.460830580462482) internal successors, (18905), 4238 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18905 transitions. [2021-07-13 19:54:43,152 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18905 transitions. Word has length 30 [2021-07-13 19:54:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:43,152 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18905 transitions. [2021-07-13 19:54:43,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18905 transitions. [2021-07-13 19:54:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:43,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:43,159 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:43,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:54:43,360 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -620043988, now seen corresponding path program 12 times [2021-07-13 19:54:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:43,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496425396] [2021-07-13 19:54:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:43,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496425396] [2021-07-13 19:54:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496425396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994093850] [2021-07-13 19:54:43,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:43,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:43,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:43,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:43,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:43,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:43,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:43,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-13 19:54:43,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:54:43,777 INFO L628 ElimStorePlain]: treesize reduction 27, result has 52.6 percent of original size [2021-07-13 19:54:43,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:43,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-07-13 19:54:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:43,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994093850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:43,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:43,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:54:43,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470681199] [2021-07-13 19:54:43,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:54:43,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:43,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:54:43,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:54:43,869 INFO L87 Difference]: Start difference. First operand 4239 states and 18905 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:45,427 INFO L93 Difference]: Finished difference Result 5775 states and 24871 transitions. [2021-07-13 19:54:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:54:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:45,441 INFO L225 Difference]: With dead ends: 5775 [2021-07-13 19:54:45,441 INFO L226 Difference]: Without dead ends: 5492 [2021-07-13 19:54:45,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1009.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:54:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-07-13 19:54:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 4251. [2021-07-13 19:54:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4251 states, 4250 states have (on average 4.459764705882353) internal successors, (18954), 4250 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4251 states to 4251 states and 18954 transitions. [2021-07-13 19:54:45,520 INFO L78 Accepts]: Start accepts. Automaton has 4251 states and 18954 transitions. Word has length 30 [2021-07-13 19:54:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:45,520 INFO L482 AbstractCegarLoop]: Abstraction has 4251 states and 18954 transitions. [2021-07-13 19:54:45,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4251 states and 18954 transitions. [2021-07-13 19:54:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:45,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:45,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:45,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 19:54:45,728 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:45,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1126390254, now seen corresponding path program 13 times [2021-07-13 19:54:45,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:45,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295392019] [2021-07-13 19:54:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:45,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:45,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295392019] [2021-07-13 19:54:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295392019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888513032] [2021-07-13 19:54:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:45,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:46,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:54:46,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:46,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:46,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:54:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:46,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888513032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:46,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:46,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:54:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803651786] [2021-07-13 19:54:46,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:46,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:46,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:46,138 INFO L87 Difference]: Start difference. First operand 4251 states and 18954 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:47,558 INFO L93 Difference]: Finished difference Result 5808 states and 25286 transitions. [2021-07-13 19:54:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:54:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:47,573 INFO L225 Difference]: With dead ends: 5808 [2021-07-13 19:54:47,573 INFO L226 Difference]: Without dead ends: 5709 [2021-07-13 19:54:47,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 965.6ms TimeCoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:54:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2021-07-13 19:54:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 4219. [2021-07-13 19:54:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 4218 states have (on average 4.463963963963964) internal successors, (18829), 4218 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 18829 transitions. [2021-07-13 19:54:47,659 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 18829 transitions. Word has length 30 [2021-07-13 19:54:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:47,659 INFO L482 AbstractCegarLoop]: Abstraction has 4219 states and 18829 transitions. [2021-07-13 19:54:47,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 18829 transitions. [2021-07-13 19:54:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:47,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:47,666 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:47,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:47,867 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1630177144, now seen corresponding path program 14 times [2021-07-13 19:54:47,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:47,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291092710] [2021-07-13 19:54:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:48,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291092710] [2021-07-13 19:54:48,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291092710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346190588] [2021-07-13 19:54:48,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:48,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:54:48,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:48,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:54:48,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:48,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:48,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:54:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346190588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:48,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:48,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:54:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802464570] [2021-07-13 19:54:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:48,323 INFO L87 Difference]: Start difference. First operand 4219 states and 18829 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:50,600 INFO L93 Difference]: Finished difference Result 5840 states and 25153 transitions. [2021-07-13 19:54:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:54:50,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:50,615 INFO L225 Difference]: With dead ends: 5840 [2021-07-13 19:54:50,615 INFO L226 Difference]: Without dead ends: 5684 [2021-07-13 19:54:50,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1652.5ms TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:54:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-07-13 19:54:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4234. [2021-07-13 19:54:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-07-13 19:54:50,699 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-07-13 19:54:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-07-13 19:54:50,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-07-13 19:54:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:50,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:50,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:50,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-13 19:54:50,907 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1269203076, now seen corresponding path program 15 times [2021-07-13 19:54:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:50,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546041183] [2021-07-13 19:54:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546041183] [2021-07-13 19:54:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546041183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46600828] [2021-07-13 19:54:51,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:51,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:54:51,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:54:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:51,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:51,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:54:51,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:51,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:51,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:51,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:54:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:51,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46600828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:51,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:51,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:54:51,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103922367] [2021-07-13 19:54:51,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:51,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:51,402 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:53,647 INFO L93 Difference]: Finished difference Result 6056 states and 26106 transitions. [2021-07-13 19:54:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:54:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:53,662 INFO L225 Difference]: With dead ends: 6056 [2021-07-13 19:54:53,662 INFO L226 Difference]: Without dead ends: 5858 [2021-07-13 19:54:53,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1714.1ms TimeCoverageRelationStatistics Valid=517, Invalid=3143, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:54:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5858 states. [2021-07-13 19:54:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5858 to 4234. [2021-07-13 19:54:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-07-13 19:54:53,746 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-07-13 19:54:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:53,746 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-07-13 19:54:53,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-07-13 19:54:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:53,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:53,753 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:53,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:53,954 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:53,954 INFO L82 PathProgramCache]: Analyzing trace with hash 905499490, now seen corresponding path program 16 times [2021-07-13 19:54:53,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:53,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886584755] [2021-07-13 19:54:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:54,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886584755] [2021-07-13 19:54:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886584755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529949106] [2021-07-13 19:54:54,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:54,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:54:54,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:54,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:54:54,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:54,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:54,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:54,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:54:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:54,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529949106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:54,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:54,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:54:54,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977044633] [2021-07-13 19:54:54,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:54:54,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:54:54,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:54:54,330 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:55,741 INFO L93 Difference]: Finished difference Result 5452 states and 23785 transitions. [2021-07-13 19:54:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:54:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:55,753 INFO L225 Difference]: With dead ends: 5452 [2021-07-13 19:54:55,753 INFO L226 Difference]: Without dead ends: 5379 [2021-07-13 19:54:55,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:54:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2021-07-13 19:54:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4239. [2021-07-13 19:54:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.4624823029731004) internal successors, (18912), 4238 states have internal predecessors, (18912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18912 transitions. [2021-07-13 19:54:55,826 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18912 transitions. Word has length 30 [2021-07-13 19:54:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:55,827 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18912 transitions. [2021-07-13 19:54:55,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18912 transitions. [2021-07-13 19:54:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:55,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:55,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:56,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 19:54:56,034 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:56,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash 372742508, now seen corresponding path program 17 times [2021-07-13 19:54:56,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:56,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708711002] [2021-07-13 19:54:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:56,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:56,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708711002] [2021-07-13 19:54:56,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708711002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:56,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950562635] [2021-07-13 19:54:56,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:56,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:54:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:56,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:56,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 19:54:56,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:56,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:56,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:56,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:94 [2021-07-13 19:54:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:56,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950562635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:56,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:56,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:54:56,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623757837] [2021-07-13 19:54:56,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:54:56,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:54:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:54:56,514 INFO L87 Difference]: Start difference. First operand 4239 states and 18912 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:54:57,756 INFO L93 Difference]: Finished difference Result 5163 states and 22549 transitions. [2021-07-13 19:54:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:54:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:54:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:54:57,769 INFO L225 Difference]: With dead ends: 5163 [2021-07-13 19:54:57,769 INFO L226 Difference]: Without dead ends: 5104 [2021-07-13 19:54:57,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 914.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:54:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-07-13 19:54:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4237. [2021-07-13 19:54:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.4627006610009445) internal successors, (18904), 4236 states have internal predecessors, (18904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18904 transitions. [2021-07-13 19:54:57,838 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18904 transitions. Word has length 30 [2021-07-13 19:54:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:54:57,838 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18904 transitions. [2021-07-13 19:54:57,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:54:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18904 transitions. [2021-07-13 19:54:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:54:57,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:54:57,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:54:58,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-13 19:54:58,046 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:54:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:54:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1254276420, now seen corresponding path program 18 times [2021-07-13 19:54:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:54:58,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410651991] [2021-07-13 19:54:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:54:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:54:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:58,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:54:58,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410651991] [2021-07-13 19:54:58,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410651991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:58,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686909860] [2021-07-13 19:54:58,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:54:58,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:54:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:54:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:54:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:54:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:58,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:54:58,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:58,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 19:54:58,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:54:58,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:54:58,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-13 19:54:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:54:58,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686909860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:54:58,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:54:58,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:54:58,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990866549] [2021-07-13 19:54:58,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:54:58,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:54:58,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:54:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:54:58,553 INFO L87 Difference]: Start difference. First operand 4237 states and 18904 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:00,165 INFO L93 Difference]: Finished difference Result 5671 states and 24419 transitions. [2021-07-13 19:55:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:55:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:00,179 INFO L225 Difference]: With dead ends: 5671 [2021-07-13 19:55:00,179 INFO L226 Difference]: Without dead ends: 5525 [2021-07-13 19:55:00,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1174.9ms TimeCoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:55:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-07-13 19:55:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 4234. [2021-07-13 19:55:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-07-13 19:55:00,258 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-07-13 19:55:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:00,258 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-07-13 19:55:00,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-07-13 19:55:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:00,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:00,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:00,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:00,467 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1472992276, now seen corresponding path program 19 times [2021-07-13 19:55:00,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:00,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159196593] [2021-07-13 19:55:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:00,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159196593] [2021-07-13 19:55:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159196593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524514196] [2021-07-13 19:55:00,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:55:00,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:00,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:00,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:55:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524514196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:00,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:55:00,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872502989] [2021-07-13 19:55:00,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:00,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:00,850 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:02,416 INFO L93 Difference]: Finished difference Result 5602 states and 24458 transitions. [2021-07-13 19:55:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:55:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:02,430 INFO L225 Difference]: With dead ends: 5602 [2021-07-13 19:55:02,430 INFO L226 Difference]: Without dead ends: 5521 [2021-07-13 19:55:02,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1176.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:55:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-07-13 19:55:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4244. [2021-07-13 19:55:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4244 states, 4243 states have (on average 4.460994579307094) internal successors, (18928), 4243 states have internal predecessors, (18928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4244 states to 4244 states and 18928 transitions. [2021-07-13 19:55:02,511 INFO L78 Accepts]: Start accepts. Automaton has 4244 states and 18928 transitions. Word has length 30 [2021-07-13 19:55:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:02,511 INFO L482 AbstractCegarLoop]: Abstraction has 4244 states and 18928 transitions. [2021-07-13 19:55:02,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4244 states and 18928 transitions. [2021-07-13 19:55:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:02,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:02,519 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:02,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:55:02,720 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash 271371730, now seen corresponding path program 20 times [2021-07-13 19:55:02,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:02,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350042585] [2021-07-13 19:55:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:02,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350042585] [2021-07-13 19:55:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350042585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349518534] [2021-07-13 19:55:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:02,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:02,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:02,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:02,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:02,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:55:02,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:03,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:03,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:03,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:55:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:03,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349518534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:03,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:03,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:55:03,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670902328] [2021-07-13 19:55:03,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:03,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:03,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:03,129 INFO L87 Difference]: Start difference. First operand 4244 states and 18928 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:04,739 INFO L93 Difference]: Finished difference Result 5552 states and 24126 transitions. [2021-07-13 19:55:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:55:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:04,752 INFO L225 Difference]: With dead ends: 5552 [2021-07-13 19:55:04,752 INFO L226 Difference]: Without dead ends: 5471 [2021-07-13 19:55:04,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1081.6ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:55:04,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-07-13 19:55:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4231. [2021-07-13 19:55:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 4.4635933806146575) internal successors, (18881), 4230 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 18881 transitions. [2021-07-13 19:55:04,829 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 18881 transitions. Word has length 30 [2021-07-13 19:55:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:04,829 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 18881 transitions. [2021-07-13 19:55:04,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 18881 transitions. [2021-07-13 19:55:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:04,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:04,837 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:05,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-13 19:55:05,037 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:05,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:05,037 INFO L82 PathProgramCache]: Analyzing trace with hash 594062564, now seen corresponding path program 23 times [2021-07-13 19:55:05,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:05,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493380384] [2021-07-13 19:55:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:05,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:05,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493380384] [2021-07-13 19:55:05,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493380384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:05,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822022130] [2021-07-13 19:55:05,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:05,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:55:05,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:05,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:05,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:05,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:05,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 19:55:05,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:05,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:05,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:05,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:241 [2021-07-13 19:55:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:05,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822022130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:05,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:05,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:55:05,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696505980] [2021-07-13 19:55:05,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:05,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:05,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:05,789 INFO L87 Difference]: Start difference. First operand 4231 states and 18881 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:06,437 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 19:55:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:07,465 INFO L93 Difference]: Finished difference Result 5055 states and 22181 transitions. [2021-07-13 19:55:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:55:07,466 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:07,479 INFO L225 Difference]: With dead ends: 5055 [2021-07-13 19:55:07,479 INFO L226 Difference]: Without dead ends: 5006 [2021-07-13 19:55:07,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1451.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:55:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-07-13 19:55:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4233. [2021-07-13 19:55:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 4.4629017013232515) internal successors, (18887), 4232 states have internal predecessors, (18887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 18887 transitions. [2021-07-13 19:55:07,554 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 18887 transitions. Word has length 30 [2021-07-13 19:55:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:07,554 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 18887 transitions. [2021-07-13 19:55:07,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 18887 transitions. [2021-07-13 19:55:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:07,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:07,562 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:07,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-13 19:55:07,763 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1739649234, now seen corresponding path program 24 times [2021-07-13 19:55:07,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:07,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164917060] [2021-07-13 19:55:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:07,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164917060] [2021-07-13 19:55:07,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164917060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944816298] [2021-07-13 19:55:07,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:08,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:08,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:08,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 19:55:08,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:08,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:08,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-07-13 19:55:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:08,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944816298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:08,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:08,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:55:08,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092295826] [2021-07-13 19:55:08,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:08,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:08,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:08,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:08,479 INFO L87 Difference]: Start difference. First operand 4233 states and 18887 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:11,096 INFO L93 Difference]: Finished difference Result 4928 states and 21374 transitions. [2021-07-13 19:55:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:55:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:11,108 INFO L225 Difference]: With dead ends: 4928 [2021-07-13 19:55:11,108 INFO L226 Difference]: Without dead ends: 4797 [2021-07-13 19:55:11,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1877.6ms TimeCoverageRelationStatistics Valid=335, Invalid=2115, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:55:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-07-13 19:55:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4246. [2021-07-13 19:55:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 4245 states have (on average 4.4621908127208485) internal successors, (18942), 4245 states have internal predecessors, (18942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 18942 transitions. [2021-07-13 19:55:11,183 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 18942 transitions. Word has length 30 [2021-07-13 19:55:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:11,183 INFO L482 AbstractCegarLoop]: Abstraction has 4246 states and 18942 transitions. [2021-07-13 19:55:11,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 18942 transitions. [2021-07-13 19:55:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:11,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:11,191 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:11,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:11,393 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash -801524512, now seen corresponding path program 25 times [2021-07-13 19:55:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:11,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831084675] [2021-07-13 19:55:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:11,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831084675] [2021-07-13 19:55:11,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831084675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831502813] [2021-07-13 19:55:11,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:11,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:11,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:11,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:55:11,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:11,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:11,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:55:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:11,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831502813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:11,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:11,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:11,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723623426] [2021-07-13 19:55:11,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:11,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:11,958 INFO L87 Difference]: Start difference. First operand 4246 states and 18942 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:12,412 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-13 19:55:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:13,552 INFO L93 Difference]: Finished difference Result 5065 states and 22182 transitions. [2021-07-13 19:55:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:55:13,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:13,564 INFO L225 Difference]: With dead ends: 5065 [2021-07-13 19:55:13,564 INFO L226 Difference]: Without dead ends: 4982 [2021-07-13 19:55:13,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1278.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:55:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-07-13 19:55:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4237. [2021-07-13 19:55:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.462936732766761) internal successors, (18905), 4236 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18905 transitions. [2021-07-13 19:55:13,637 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18905 transitions. Word has length 30 [2021-07-13 19:55:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:13,637 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18905 transitions. [2021-07-13 19:55:13,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18905 transitions. [2021-07-13 19:55:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:13,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:13,644 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:13,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 19:55:13,845 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash 492452108, now seen corresponding path program 26 times [2021-07-13 19:55:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:13,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981958290] [2021-07-13 19:55:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:14,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981958290] [2021-07-13 19:55:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981958290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:14,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494657902] [2021-07-13 19:55:14,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:14,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:14,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:14,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:14,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 19:55:14,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:14,370 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-07-13 19:55:14,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:55:14,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-07-13 19:55:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:14,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494657902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:14,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:14,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:55:14,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223798057] [2021-07-13 19:55:14,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:14,524 INFO L87 Difference]: Start difference. First operand 4237 states and 18905 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:16,200 INFO L93 Difference]: Finished difference Result 5335 states and 23067 transitions. [2021-07-13 19:55:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:55:16,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:16,213 INFO L225 Difference]: With dead ends: 5335 [2021-07-13 19:55:16,213 INFO L226 Difference]: Without dead ends: 5117 [2021-07-13 19:55:16,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1297.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:55:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-13 19:55:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4259. [2021-07-13 19:55:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-07-13 19:55:16,310 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-07-13 19:55:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:16,310 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-07-13 19:55:16,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-07-13 19:55:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:16,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:16,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:16,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:16,518 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash -172480814, now seen corresponding path program 21 times [2021-07-13 19:55:16,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:16,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777018374] [2021-07-13 19:55:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:16,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777018374] [2021-07-13 19:55:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777018374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560745017] [2021-07-13 19:55:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:16,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:16,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:55:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:17,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:17,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:17,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-07-13 19:55:17,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:55:17,085 INFO L628 ElimStorePlain]: treesize reduction 33, result has 54.2 percent of original size [2021-07-13 19:55:17,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:17,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:41 [2021-07-13 19:55:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:17,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560745017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:17,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:17,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:55:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203688459] [2021-07-13 19:55:17,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:17,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:17,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:17,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:17,199 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:18,944 INFO L93 Difference]: Finished difference Result 5095 states and 22084 transitions. [2021-07-13 19:55:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:18,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:18,956 INFO L225 Difference]: With dead ends: 5095 [2021-07-13 19:55:18,956 INFO L226 Difference]: Without dead ends: 4933 [2021-07-13 19:55:18,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1226.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1973, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:55:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-07-13 19:55:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4259. [2021-07-13 19:55:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-07-13 19:55:19,030 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-07-13 19:55:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:19,030 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-07-13 19:55:19,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-07-13 19:55:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:19,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:19,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:19,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-13 19:55:19,238 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1897976964, now seen corresponding path program 22 times [2021-07-13 19:55:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:19,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711871023] [2021-07-13 19:55:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:19,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:19,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711871023] [2021-07-13 19:55:19,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711871023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:19,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584525801] [2021-07-13 19:55:19,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:19,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:19,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:19,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:19,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:55:19,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:19,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:19,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:19,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:55:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584525801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:19,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:19,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 19:55:19,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652238776] [2021-07-13 19:55:19,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:19,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:19,730 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:20,835 INFO L93 Difference]: Finished difference Result 4880 states and 21466 transitions. [2021-07-13 19:55:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:55:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:20,847 INFO L225 Difference]: With dead ends: 4880 [2021-07-13 19:55:20,847 INFO L226 Difference]: Without dead ends: 4807 [2021-07-13 19:55:20,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 792.2ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:55:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-07-13 19:55:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 4264. [2021-07-13 19:55:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 4.4677457189772465) internal successors, (19046), 4263 states have internal predecessors, (19046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 19046 transitions. [2021-07-13 19:55:20,946 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 19046 transitions. Word has length 30 [2021-07-13 19:55:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:20,946 INFO L482 AbstractCegarLoop]: Abstraction has 4264 states and 19046 transitions. [2021-07-13 19:55:20,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 19046 transitions. [2021-07-13 19:55:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:20,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:20,953 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:21,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:21,154 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1365219982, now seen corresponding path program 23 times [2021-07-13 19:55:21,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:21,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062338741] [2021-07-13 19:55:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:21,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062338741] [2021-07-13 19:55:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062338741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13739741] [2021-07-13 19:55:21,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:21,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:55:21,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:21,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:21,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:21,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:21,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 19:55:21,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:21,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:21,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:21,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:239 [2021-07-13 19:55:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:21,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13739741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:21,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:21,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-07-13 19:55:21,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990861160] [2021-07-13 19:55:21,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:21,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:21,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:21,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:21,793 INFO L87 Difference]: Start difference. First operand 4264 states and 19046 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:22,952 INFO L93 Difference]: Finished difference Result 5027 states and 22179 transitions. [2021-07-13 19:55:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:55:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:22,964 INFO L225 Difference]: With dead ends: 5027 [2021-07-13 19:55:22,965 INFO L226 Difference]: Without dead ends: 4990 [2021-07-13 19:55:22,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 950.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:55:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2021-07-13 19:55:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4267. [2021-07-13 19:55:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 4.46671354899203) internal successors, (19055), 4266 states have internal predecessors, (19055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 19055 transitions. [2021-07-13 19:55:23,075 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 19055 transitions. Word has length 30 [2021-07-13 19:55:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:23,075 INFO L482 AbstractCegarLoop]: Abstraction has 4267 states and 19055 transitions. [2021-07-13 19:55:23,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 19055 transitions. [2021-07-13 19:55:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:23,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:23,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:23,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:23,283 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2048213402, now seen corresponding path program 24 times [2021-07-13 19:55:23,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:23,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489974685] [2021-07-13 19:55:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:23,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:23,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489974685] [2021-07-13 19:55:23,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489974685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:23,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999358698] [2021-07-13 19:55:23,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:23,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:23,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:23,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:23,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:23,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 19:55:23,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:23,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:23,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:23,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-13 19:55:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:23,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999358698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:23,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:23,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:23,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333620500] [2021-07-13 19:55:23,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:23,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:23,884 INFO L87 Difference]: Start difference. First operand 4267 states and 19055 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:25,904 INFO L93 Difference]: Finished difference Result 5190 states and 22713 transitions. [2021-07-13 19:55:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:25,916 INFO L225 Difference]: With dead ends: 5190 [2021-07-13 19:55:25,917 INFO L226 Difference]: Without dead ends: 5093 [2021-07-13 19:55:25,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1435.7ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:55:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5093 states. [2021-07-13 19:55:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5093 to 4284. [2021-07-13 19:55:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 4283 states have (on average 4.46439411627364) internal successors, (19121), 4283 states have internal predecessors, (19121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 19121 transitions. [2021-07-13 19:55:25,989 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 19121 transitions. Word has length 30 [2021-07-13 19:55:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:25,989 INFO L482 AbstractCegarLoop]: Abstraction has 4284 states and 19121 transitions. [2021-07-13 19:55:25,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 19121 transitions. [2021-07-13 19:55:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:25,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:25,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:26,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2021-07-13 19:55:26,197 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:26,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:26,197 INFO L82 PathProgramCache]: Analyzing trace with hash 87177790, now seen corresponding path program 27 times [2021-07-13 19:55:26,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:26,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691746371] [2021-07-13 19:55:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:26,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691746371] [2021-07-13 19:55:26,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691746371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977996665] [2021-07-13 19:55:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:26,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:26,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:26,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:26,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:26,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:26,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 19:55:26,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:26,682 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-07-13 19:55:26,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:55:26,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-07-13 19:55:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:26,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977996665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:26,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:26,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:55:26,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207746336] [2021-07-13 19:55:26,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:26,820 INFO L87 Difference]: Start difference. First operand 4284 states and 19121 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:28,719 INFO L93 Difference]: Finished difference Result 5631 states and 24074 transitions. [2021-07-13 19:55:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:28,732 INFO L225 Difference]: With dead ends: 5631 [2021-07-13 19:55:28,732 INFO L226 Difference]: Without dead ends: 5413 [2021-07-13 19:55:28,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:55:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-07-13 19:55:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4304. [2021-07-13 19:55:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4303 states have (on average 4.466186381594237) internal successors, (19218), 4303 states have internal predecessors, (19218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 19218 transitions. [2021-07-13 19:55:28,812 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 19218 transitions. Word has length 30 [2021-07-13 19:55:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:28,812 INFO L482 AbstractCegarLoop]: Abstraction has 4304 states and 19218 transitions. [2021-07-13 19:55:28,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 19218 transitions. [2021-07-13 19:55:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:28,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:28,820 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:29,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:29,020 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:29,020 INFO L82 PathProgramCache]: Analyzing trace with hash -577755132, now seen corresponding path program 25 times [2021-07-13 19:55:29,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:29,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796389039] [2021-07-13 19:55:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:29,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:29,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796389039] [2021-07-13 19:55:29,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796389039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:29,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674044826] [2021-07-13 19:55:29,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:29,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:29,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:55:29,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:29,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:29,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 19:55:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:29,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674044826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:29,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:29,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:55:29,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176800143] [2021-07-13 19:55:29,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:55:29,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:55:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:55:29,494 INFO L87 Difference]: Start difference. First operand 4304 states and 19218 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:30,692 INFO L93 Difference]: Finished difference Result 5375 states and 23515 transitions. [2021-07-13 19:55:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:55:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:30,704 INFO L225 Difference]: With dead ends: 5375 [2021-07-13 19:55:30,705 INFO L226 Difference]: Without dead ends: 5284 [2021-07-13 19:55:30,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:55:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-07-13 19:55:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4316. [2021-07-13 19:55:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 4.464426419466975) internal successors, (19264), 4315 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 19264 transitions. [2021-07-13 19:55:30,782 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 19264 transitions. Word has length 30 [2021-07-13 19:55:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:30,782 INFO L482 AbstractCegarLoop]: Abstraction has 4316 states and 19264 transitions. [2021-07-13 19:55:30,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 19264 transitions. [2021-07-13 19:55:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:30,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:30,789 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:30,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-07-13 19:55:30,990 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash -346038464, now seen corresponding path program 26 times [2021-07-13 19:55:30,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:30,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660540661] [2021-07-13 19:55:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:31,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660540661] [2021-07-13 19:55:31,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660540661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190541665] [2021-07-13 19:55:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:31,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:31,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:31,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:55:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:31,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:31,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:31,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-13 19:55:31,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:31,439 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-07-13 19:55:31,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:31,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-07-13 19:55:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190541665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:31,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:31,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:31,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479126367] [2021-07-13 19:55:31,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:31,539 INFO L87 Difference]: Start difference. First operand 4316 states and 19264 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:32,971 INFO L93 Difference]: Finished difference Result 5842 states and 25410 transitions. [2021-07-13 19:55:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:55:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:32,986 INFO L225 Difference]: With dead ends: 5842 [2021-07-13 19:55:32,986 INFO L226 Difference]: Without dead ends: 5705 [2021-07-13 19:55:32,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1106.5ms TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:55:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2021-07-13 19:55:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 4349. [2021-07-13 19:55:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.459521619135234) internal successors, (19390), 4348 states have internal predecessors, (19390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 19390 transitions. [2021-07-13 19:55:33,066 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 19390 transitions. Word has length 30 [2021-07-13 19:55:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:33,066 INFO L482 AbstractCegarLoop]: Abstraction has 4349 states and 19390 transitions. [2021-07-13 19:55:33,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 19390 transitions. [2021-07-13 19:55:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:33,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:33,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:33,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-13 19:55:33,274 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash -852384730, now seen corresponding path program 27 times [2021-07-13 19:55:33,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:33,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406145565] [2021-07-13 19:55:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:33,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:33,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406145565] [2021-07-13 19:55:33,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406145565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:33,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059592692] [2021-07-13 19:55:33,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:33,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:33,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:33,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:55:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:33,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-07-13 19:55:33,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:55:33,776 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-07-13 19:55:33,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:33,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:53 [2021-07-13 19:55:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:33,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059592692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:33,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:33,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:55:33,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352192628] [2021-07-13 19:55:33,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:33,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:33,914 INFO L87 Difference]: Start difference. First operand 4349 states and 19390 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:35,758 INFO L93 Difference]: Finished difference Result 5104 states and 22142 transitions. [2021-07-13 19:55:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:55:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:35,770 INFO L225 Difference]: With dead ends: 5104 [2021-07-13 19:55:35,770 INFO L226 Difference]: Without dead ends: 4942 [2021-07-13 19:55:35,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1264.5ms TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:55:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-07-13 19:55:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4339. [2021-07-13 19:55:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 4338 states have (on average 4.461041954817889) internal successors, (19352), 4338 states have internal predecessors, (19352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 19352 transitions. [2021-07-13 19:55:35,851 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 19352 transitions. Word has length 30 [2021-07-13 19:55:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:35,851 INFO L482 AbstractCegarLoop]: Abstraction has 4339 states and 19352 transitions. [2021-07-13 19:55:35,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 19352 transitions. [2021-07-13 19:55:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:35,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:35,859 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:36,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:36,059 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash 496859426, now seen corresponding path program 28 times [2021-07-13 19:55:36,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:36,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279479508] [2021-07-13 19:55:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:36,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279479508] [2021-07-13 19:55:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279479508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355104231] [2021-07-13 19:55:36,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:36,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:36,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:55:36,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:36,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:36,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:36,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:55:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:36,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355104231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:36,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:36,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 19:55:36,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107851069] [2021-07-13 19:55:36,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:36,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:36,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:36,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:36,531 INFO L87 Difference]: Start difference. First operand 4339 states and 19352 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:37,161 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-13 19:55:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:37,623 INFO L93 Difference]: Finished difference Result 4835 states and 21285 transitions. [2021-07-13 19:55:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:55:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:37,635 INFO L225 Difference]: With dead ends: 4835 [2021-07-13 19:55:37,635 INFO L226 Difference]: Without dead ends: 4762 [2021-07-13 19:55:37,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:55:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2021-07-13 19:55:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4351. [2021-07-13 19:55:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.46) internal successors, (19401), 4350 states have internal predecessors, (19401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19401 transitions. [2021-07-13 19:55:37,714 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19401 transitions. Word has length 30 [2021-07-13 19:55:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:37,714 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19401 transitions. [2021-07-13 19:55:37,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19401 transitions. [2021-07-13 19:55:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:37,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:37,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:37,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-07-13 19:55:37,922 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -898727650, now seen corresponding path program 29 times [2021-07-13 19:55:37,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:37,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927885091] [2021-07-13 19:55:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:38,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:38,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927885091] [2021-07-13 19:55:38,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927885091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:38,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066864508] [2021-07-13 19:55:38,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:38,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:38,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:38,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 19:55:38,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:38,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:38,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:38,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-07-13 19:55:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066864508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:38,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:38,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254500638] [2021-07-13 19:55:38,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:38,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:38,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:38,533 INFO L87 Difference]: Start difference. First operand 4351 states and 19401 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:39,901 INFO L93 Difference]: Finished difference Result 5039 states and 22207 transitions. [2021-07-13 19:55:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:39,914 INFO L225 Difference]: With dead ends: 5039 [2021-07-13 19:55:39,914 INFO L226 Difference]: Without dead ends: 4976 [2021-07-13 19:55:39,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:55:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-07-13 19:55:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4352. [2021-07-13 19:55:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-07-13 19:55:39,990 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-07-13 19:55:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:39,990 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-07-13 19:55:39,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-07-13 19:55:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:39,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:39,999 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:40,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-13 19:55:40,199 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1262431236, now seen corresponding path program 30 times [2021-07-13 19:55:40,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:40,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227800453] [2021-07-13 19:55:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:40,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:40,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227800453] [2021-07-13 19:55:40,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227800453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:40,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417153511] [2021-07-13 19:55:40,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:40,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:55:40,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:40,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:40,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:40,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 19:55:40,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:40,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:40,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:40,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 19:55:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:40,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417153511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:40,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:40,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:55:40,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527163296] [2021-07-13 19:55:40,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:40,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:40,873 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:42,723 INFO L93 Difference]: Finished difference Result 4881 states and 21439 transitions. [2021-07-13 19:55:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:55:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:42,735 INFO L225 Difference]: With dead ends: 4881 [2021-07-13 19:55:42,735 INFO L226 Difference]: Without dead ends: 4791 [2021-07-13 19:55:42,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1347.3ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:55:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-07-13 19:55:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4357. [2021-07-13 19:55:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4357 states, 4356 states have (on average 4.459595959595959) internal successors, (19426), 4356 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 19426 transitions. [2021-07-13 19:55:42,813 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 19426 transitions. Word has length 30 [2021-07-13 19:55:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:42,814 INFO L482 AbstractCegarLoop]: Abstraction has 4357 states and 19426 transitions. [2021-07-13 19:55:42,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 19426 transitions. [2021-07-13 19:55:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:42,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:42,822 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:43,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-13 19:55:43,022 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1795188218, now seen corresponding path program 31 times [2021-07-13 19:55:43,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:43,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649579212] [2021-07-13 19:55:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649579212] [2021-07-13 19:55:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649579212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916353272] [2021-07-13 19:55:43,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:43,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:43,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:55:43,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:43,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:43,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:43,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:55:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:43,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916353272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:43,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:43,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-13 19:55:43,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599398503] [2021-07-13 19:55:43,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:43,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:43,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:43,479 INFO L87 Difference]: Start difference. First operand 4357 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:44,261 INFO L93 Difference]: Finished difference Result 4973 states and 21853 transitions. [2021-07-13 19:55:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:55:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:44,273 INFO L225 Difference]: With dead ends: 4973 [2021-07-13 19:55:44,273 INFO L226 Difference]: Without dead ends: 4899 [2021-07-13 19:55:44,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:55:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-07-13 19:55:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4352. [2021-07-13 19:55:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-07-13 19:55:44,349 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-07-13 19:55:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-07-13 19:55:44,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-07-13 19:55:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:44,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:44,357 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:44,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-13 19:55:44,557 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:44,558 INFO L82 PathProgramCache]: Analyzing trace with hash 654044294, now seen corresponding path program 32 times [2021-07-13 19:55:44,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:44,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111960029] [2021-07-13 19:55:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:44,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111960029] [2021-07-13 19:55:44,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111960029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455272294] [2021-07-13 19:55:44,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:44,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:44,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:44,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 19:55:44,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:44,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:44,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:44,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-13 19:55:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:45,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455272294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:45,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:45,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:55:45,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363718877] [2021-07-13 19:55:45,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:45,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:45,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:45,217 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:47,167 INFO L93 Difference]: Finished difference Result 4883 states and 21378 transitions. [2021-07-13 19:55:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:55:47,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:47,179 INFO L225 Difference]: With dead ends: 4883 [2021-07-13 19:55:47,179 INFO L226 Difference]: Without dead ends: 4786 [2021-07-13 19:55:47,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1499.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:55:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-07-13 19:55:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4354. [2021-07-13 19:55:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.4601424305076955) internal successors, (19415), 4353 states have internal predecessors, (19415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19415 transitions. [2021-07-13 19:55:47,257 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19415 transitions. Word has length 30 [2021-07-13 19:55:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:47,257 INFO L482 AbstractCegarLoop]: Abstraction has 4354 states and 19415 transitions. [2021-07-13 19:55:47,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19415 transitions. [2021-07-13 19:55:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:47,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:47,265 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:47,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-13 19:55:47,465 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1896558996, now seen corresponding path program 33 times [2021-07-13 19:55:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:47,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705058981] [2021-07-13 19:55:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:47,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705058981] [2021-07-13 19:55:47,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705058981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119286233] [2021-07-13 19:55:47,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:47,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:47,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:47,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:47,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:47,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 19:55:47,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:47,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:47,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:47,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-13 19:55:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:48,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119286233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:48,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:48,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:55:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212189155] [2021-07-13 19:55:48,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:48,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:48,162 INFO L87 Difference]: Start difference. First operand 4354 states and 19415 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:50,164 INFO L93 Difference]: Finished difference Result 4807 states and 21085 transitions. [2021-07-13 19:55:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:55:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:50,176 INFO L225 Difference]: With dead ends: 4807 [2021-07-13 19:55:50,176 INFO L226 Difference]: Without dead ends: 4726 [2021-07-13 19:55:50,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:55:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-07-13 19:55:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4350. [2021-07-13 19:55:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.460335709358473) internal successors, (19398), 4349 states have internal predecessors, (19398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19398 transitions. [2021-07-13 19:55:50,255 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19398 transitions. Word has length 30 [2021-07-13 19:55:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:50,255 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19398 transitions. [2021-07-13 19:55:50,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19398 transitions. [2021-07-13 19:55:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:50,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:50,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:50,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-13 19:55:50,464 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 254880366, now seen corresponding path program 34 times [2021-07-13 19:55:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:50,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105116861] [2021-07-13 19:55:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:50,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:50,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105116861] [2021-07-13 19:55:50,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105116861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:50,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351253513] [2021-07-13 19:55:50,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:50,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:50,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:50,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:50,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:55:50,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:50,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:50,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:50,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:55:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:50,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351253513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:50,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:50,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-13 19:55:50,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144224685] [2021-07-13 19:55:50,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:55:50,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:55:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:55:50,904 INFO L87 Difference]: Start difference. First operand 4350 states and 19398 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:51,959 INFO L93 Difference]: Finished difference Result 5100 states and 22309 transitions. [2021-07-13 19:55:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:55:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:51,971 INFO L225 Difference]: With dead ends: 5100 [2021-07-13 19:55:51,972 INFO L226 Difference]: Without dead ends: 5043 [2021-07-13 19:55:51,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:55:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-07-13 19:55:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4351. [2021-07-13 19:55:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.465287356321839) internal successors, (19424), 4350 states have internal predecessors, (19424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19424 transitions. [2021-07-13 19:55:52,054 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19424 transitions. Word has length 30 [2021-07-13 19:55:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:52,054 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19424 transitions. [2021-07-13 19:55:52,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19424 transitions. [2021-07-13 19:55:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:52,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:52,062 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:52,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:52,265 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash 969357380, now seen corresponding path program 35 times [2021-07-13 19:55:52,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:52,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059445984] [2021-07-13 19:55:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:52,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:52,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059445984] [2021-07-13 19:55:52,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059445984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:52,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047868185] [2021-07-13 19:55:52,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:52,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:55:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:52,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 19:55:52,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:52,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:52,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-07-13 19:55:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:52,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047868185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:52,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:52,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:55:52,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472692656] [2021-07-13 19:55:52,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:55:52,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:55:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:55:52,877 INFO L87 Difference]: Start difference. First operand 4351 states and 19424 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:53,764 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-13 19:55:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:54,603 INFO L93 Difference]: Finished difference Result 5082 states and 22380 transitions. [2021-07-13 19:55:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:55:54,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:54,616 INFO L225 Difference]: With dead ends: 5082 [2021-07-13 19:55:54,616 INFO L226 Difference]: Without dead ends: 5019 [2021-07-13 19:55:54,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1278.7ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:55:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2021-07-13 19:55:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4350. [2021-07-13 19:55:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.46562428144401) internal successors, (19421), 4349 states have internal predecessors, (19421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19421 transitions. [2021-07-13 19:55:54,701 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19421 transitions. Word has length 30 [2021-07-13 19:55:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:54,701 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19421 transitions. [2021-07-13 19:55:54,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19421 transitions. [2021-07-13 19:55:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:54,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:54,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:54,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:54,910 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2111173892, now seen corresponding path program 36 times [2021-07-13 19:55:54,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:54,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403473192] [2021-07-13 19:55:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:55,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:55,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403473192] [2021-07-13 19:55:55,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403473192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:55,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184815748] [2021-07-13 19:55:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:55,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:55:55,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:55,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:55,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:55,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 19:55:55,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:55,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:55,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:55,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-13 19:55:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:55,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184815748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:55,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:55,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:55:55,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339644610] [2021-07-13 19:55:55,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:55:55,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:55,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:55:55,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:55:55,475 INFO L87 Difference]: Start difference. First operand 4350 states and 19421 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:57,000 INFO L93 Difference]: Finished difference Result 5611 states and 24398 transitions. [2021-07-13 19:55:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:55:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:57,014 INFO L225 Difference]: With dead ends: 5611 [2021-07-13 19:55:57,014 INFO L226 Difference]: Without dead ends: 5512 [2021-07-13 19:55:57,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:55:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5512 states. [2021-07-13 19:55:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5512 to 4338. [2021-07-13 19:55:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 4.466682038275305) internal successors, (19372), 4337 states have internal predecessors, (19372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 19372 transitions. [2021-07-13 19:55:57,095 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 19372 transitions. Word has length 30 [2021-07-13 19:55:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:57,095 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 19372 transitions. [2021-07-13 19:55:57,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 19372 transitions. [2021-07-13 19:55:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:57,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:57,103 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:57,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-13 19:55:57,304 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1847516932, now seen corresponding path program 1 times [2021-07-13 19:55:57,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314539842] [2021-07-13 19:55:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314539842] [2021-07-13 19:55:57,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314539842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625552246] [2021-07-13 19:55:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:55:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:55:57,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:57,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:57,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:57,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:55:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625552246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:57,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:55:57,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657855142] [2021-07-13 19:55:57,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:55:57,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:57,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:55:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:55:57,636 INFO L87 Difference]: Start difference. First operand 4338 states and 19372 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:58,974 INFO L93 Difference]: Finished difference Result 5698 states and 24891 transitions. [2021-07-13 19:55:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:55:58,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:55:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:58,988 INFO L225 Difference]: With dead ends: 5698 [2021-07-13 19:55:58,988 INFO L226 Difference]: Without dead ends: 5616 [2021-07-13 19:55:58,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:55:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-07-13 19:55:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 4370. [2021-07-13 19:55:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4369 states have (on average 4.465552758068208) internal successors, (19510), 4369 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 19510 transitions. [2021-07-13 19:55:59,070 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 19510 transitions. Word has length 30 [2021-07-13 19:55:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:59,070 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 19510 transitions. [2021-07-13 19:55:59,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 19510 transitions. [2021-07-13 19:55:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:55:59,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:59,077 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:59,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-07-13 19:55:59,278 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:59,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1371190464, now seen corresponding path program 2 times [2021-07-13 19:55:59,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:59,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740521893] [2021-07-13 19:55:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740521893] [2021-07-13 19:55:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740521893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500365492] [2021-07-13 19:55:59,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:55:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:59,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:55:59,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:59,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:55:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500365492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:59,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:55:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419350595] [2021-07-13 19:55:59,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:55:59,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:55:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:55:59,683 INFO L87 Difference]: Start difference. First operand 4370 states and 19510 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:01,504 INFO L93 Difference]: Finished difference Result 5896 states and 25629 transitions. [2021-07-13 19:56:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:56:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:01,518 INFO L225 Difference]: With dead ends: 5896 [2021-07-13 19:56:01,518 INFO L226 Difference]: Without dead ends: 5757 [2021-07-13 19:56:01,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1214.5ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:56:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2021-07-13 19:56:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 4363. [2021-07-13 19:56:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 4.466758367721229) internal successors, (19484), 4362 states have internal predecessors, (19484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 19484 transitions. [2021-07-13 19:56:01,600 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 19484 transitions. Word has length 30 [2021-07-13 19:56:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:01,600 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 19484 transitions. [2021-07-13 19:56:01,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 19484 transitions. [2021-07-13 19:56:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:01,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:01,608 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:01,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-13 19:56:01,809 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash -692523458, now seen corresponding path program 1 times [2021-07-13 19:56:01,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:01,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651765590] [2021-07-13 19:56:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651765590] [2021-07-13 19:56:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651765590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145650247] [2021-07-13 19:56:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:02,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:02,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:02,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:02,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:02,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:56:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145650247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:02,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:02,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:56:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688640286] [2021-07-13 19:56:02,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:02,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:02,122 INFO L87 Difference]: Start difference. First operand 4363 states and 19484 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:03,578 INFO L93 Difference]: Finished difference Result 5490 states and 24056 transitions. [2021-07-13 19:56:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:56:03,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:03,592 INFO L225 Difference]: With dead ends: 5490 [2021-07-13 19:56:03,592 INFO L226 Difference]: Without dead ends: 5417 [2021-07-13 19:56:03,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:56:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2021-07-13 19:56:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 4372. [2021-07-13 19:56:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.466254861587737) internal successors, (19522), 4371 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 19522 transitions. [2021-07-13 19:56:03,678 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 19522 transitions. Word has length 30 [2021-07-13 19:56:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:03,678 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 19522 transitions. [2021-07-13 19:56:03,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 19522 transitions. [2021-07-13 19:56:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:03,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:03,686 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:03,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:03,887 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash 833547620, now seen corresponding path program 2 times [2021-07-13 19:56:03,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:03,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131542686] [2021-07-13 19:56:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:03,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131542686] [2021-07-13 19:56:03,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131542686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477984101] [2021-07-13 19:56:03,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:04,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:04,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:56:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:04,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:56:04,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:04,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:56:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:04,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477984101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:04,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:04,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:56:04,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653907609] [2021-07-13 19:56:04,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:04,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:04,225 INFO L87 Difference]: Start difference. First operand 4372 states and 19522 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:05,605 INFO L93 Difference]: Finished difference Result 5529 states and 24268 transitions. [2021-07-13 19:56:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:56:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:05,619 INFO L225 Difference]: With dead ends: 5529 [2021-07-13 19:56:05,619 INFO L226 Difference]: Without dead ends: 5450 [2021-07-13 19:56:05,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:56:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-07-13 19:56:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4364. [2021-07-13 19:56:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 4.467109786843915) internal successors, (19490), 4363 states have internal predecessors, (19490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 19490 transitions. [2021-07-13 19:56:05,703 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 19490 transitions. Word has length 30 [2021-07-13 19:56:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:05,703 INFO L482 AbstractCegarLoop]: Abstraction has 4364 states and 19490 transitions. [2021-07-13 19:56:05,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 19490 transitions. [2021-07-13 19:56:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:05,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:05,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:05,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-07-13 19:56:05,911 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1582633598, now seen corresponding path program 3 times [2021-07-13 19:56:05,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:05,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111404979] [2021-07-13 19:56:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:06,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111404979] [2021-07-13 19:56:06,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111404979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503966308] [2021-07-13 19:56:06,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:06,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:56:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:06,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:06,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:56:06,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:06,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:06,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:06,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-13 19:56:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503966308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:06,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:56:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678249607] [2021-07-13 19:56:06,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:06,291 INFO L87 Difference]: Start difference. First operand 4364 states and 19490 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:08,337 INFO L93 Difference]: Finished difference Result 5977 states and 25770 transitions. [2021-07-13 19:56:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:56:08,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:08,351 INFO L225 Difference]: With dead ends: 5977 [2021-07-13 19:56:08,351 INFO L226 Difference]: Without dead ends: 5738 [2021-07-13 19:56:08,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1428.6ms TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:56:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2021-07-13 19:56:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 4377. [2021-07-13 19:56:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.466407678244972) internal successors, (19545), 4376 states have internal predecessors, (19545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 19545 transitions. [2021-07-13 19:56:08,431 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 19545 transitions. Word has length 30 [2021-07-13 19:56:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:08,431 INFO L482 AbstractCegarLoop]: Abstraction has 4377 states and 19545 transitions. [2021-07-13 19:56:08,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 19545 transitions. [2021-07-13 19:56:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:08,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:08,438 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:08,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:08,639 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash -716978146, now seen corresponding path program 3 times [2021-07-13 19:56:08,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:08,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435373506] [2021-07-13 19:56:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:08,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435373506] [2021-07-13 19:56:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435373506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880543292] [2021-07-13 19:56:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:08,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:08,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:08,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:56:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:08,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:08,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:56:08,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:08,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:08,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:08,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-13 19:56:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880543292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:56:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564765365] [2021-07-13 19:56:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:09,080 INFO L87 Difference]: Start difference. First operand 4377 states and 19545 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:11,207 INFO L93 Difference]: Finished difference Result 6249 states and 26802 transitions. [2021-07-13 19:56:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:56:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:11,222 INFO L225 Difference]: With dead ends: 6249 [2021-07-13 19:56:11,222 INFO L226 Difference]: Without dead ends: 6018 [2021-07-13 19:56:11,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1559.3ms TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:56:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-07-13 19:56:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 4368. [2021-07-13 19:56:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 4367 states have (on average 4.468055873597435) internal successors, (19512), 4367 states have internal predecessors, (19512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 19512 transitions. [2021-07-13 19:56:11,325 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 19512 transitions. Word has length 30 [2021-07-13 19:56:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:11,325 INFO L482 AbstractCegarLoop]: Abstraction has 4368 states and 19512 transitions. [2021-07-13 19:56:11,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 19512 transitions. [2021-07-13 19:56:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:11,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:11,333 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:11,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:11,533 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1510857112, now seen corresponding path program 4 times [2021-07-13 19:56:11,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:11,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284740815] [2021-07-13 19:56:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:11,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284740815] [2021-07-13 19:56:11,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284740815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480505697] [2021-07-13 19:56:11,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:11,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:11,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:11,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:11,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:11,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:56:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480505697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:11,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:56:11,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78965618] [2021-07-13 19:56:11,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:11,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:11,836 INFO L87 Difference]: Start difference. First operand 4368 states and 19512 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:12,848 INFO L93 Difference]: Finished difference Result 5470 states and 23988 transitions. [2021-07-13 19:56:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:56:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:12,862 INFO L225 Difference]: With dead ends: 5470 [2021-07-13 19:56:12,862 INFO L226 Difference]: Without dead ends: 5397 [2021-07-13 19:56:12,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 770.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:56:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-07-13 19:56:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4380. [2021-07-13 19:56:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 4.4674583238182235) internal successors, (19563), 4379 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 19563 transitions. [2021-07-13 19:56:12,948 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 19563 transitions. Word has length 30 [2021-07-13 19:56:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:12,949 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 19563 transitions. [2021-07-13 19:56:12,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 19563 transitions. [2021-07-13 19:56:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:12,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:12,957 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:13,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-07-13 19:56:13,157 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1258039106, now seen corresponding path program 5 times [2021-07-13 19:56:13,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:13,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913868898] [2021-07-13 19:56:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:13,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913868898] [2021-07-13 19:56:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913868898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293725256] [2021-07-13 19:56:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:13,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:13,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:13,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:13,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:13,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:13,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:56:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:13,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293725256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:13,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:13,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 19:56:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937339852] [2021-07-13 19:56:13,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:13,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:13,482 INFO L87 Difference]: Start difference. First operand 4380 states and 19563 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:14,414 INFO L93 Difference]: Finished difference Result 5476 states and 24063 transitions. [2021-07-13 19:56:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:56:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:14,428 INFO L225 Difference]: With dead ends: 5476 [2021-07-13 19:56:14,428 INFO L226 Difference]: Without dead ends: 5401 [2021-07-13 19:56:14,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-07-13 19:56:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4371. [2021-07-13 19:56:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467963386727689) internal successors, (19525), 4370 states have internal predecessors, (19525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19525 transitions. [2021-07-13 19:56:14,510 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19525 transitions. Word has length 30 [2021-07-13 19:56:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:14,510 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19525 transitions. [2021-07-13 19:56:14,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19525 transitions. [2021-07-13 19:56:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:14,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:14,518 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:14,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-13 19:56:14,718 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1039746178, now seen corresponding path program 6 times [2021-07-13 19:56:14,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:14,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698334065] [2021-07-13 19:56:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698334065] [2021-07-13 19:56:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698334065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353422547] [2021-07-13 19:56:14,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:56:14,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:15,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 19:56:15,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:15,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:15,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:15,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-07-13 19:56:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:15,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353422547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:15,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:15,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:56:15,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884909054] [2021-07-13 19:56:15,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:15,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:15,156 INFO L87 Difference]: Start difference. First operand 4371 states and 19525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:16,978 INFO L93 Difference]: Finished difference Result 5542 states and 24211 transitions. [2021-07-13 19:56:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:56:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:16,992 INFO L225 Difference]: With dead ends: 5542 [2021-07-13 19:56:16,992 INFO L226 Difference]: Without dead ends: 5453 [2021-07-13 19:56:16,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1393.7ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:56:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-07-13 19:56:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4383. [2021-07-13 19:56:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4382 states have (on average 4.466910086718394) internal successors, (19574), 4382 states have internal predecessors, (19574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 19574 transitions. [2021-07-13 19:56:17,075 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 19574 transitions. Word has length 30 [2021-07-13 19:56:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:17,075 INFO L482 AbstractCegarLoop]: Abstraction has 4383 states and 19574 transitions. [2021-07-13 19:56:17,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 19574 transitions. [2021-07-13 19:56:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:17,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:17,083 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:17,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:17,284 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash 215379232, now seen corresponding path program 7 times [2021-07-13 19:56:17,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:17,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398568663] [2021-07-13 19:56:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:17,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398568663] [2021-07-13 19:56:17,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398568663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672841870] [2021-07-13 19:56:17,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:17,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:17,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:17,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:17,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:56:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672841870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:17,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:56:17,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196809064] [2021-07-13 19:56:17,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:17,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:17,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:17,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:17,593 INFO L87 Difference]: Start difference. First operand 4383 states and 19574 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:18,772 INFO L93 Difference]: Finished difference Result 5522 states and 24182 transitions. [2021-07-13 19:56:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:56:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:18,786 INFO L225 Difference]: With dead ends: 5522 [2021-07-13 19:56:18,786 INFO L226 Difference]: Without dead ends: 5463 [2021-07-13 19:56:18,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 828.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:56:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-07-13 19:56:18,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4377. [2021-07-13 19:56:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.467321755027422) internal successors, (19549), 4376 states have internal predecessors, (19549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 19549 transitions. [2021-07-13 19:56:18,868 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 19549 transitions. Word has length 30 [2021-07-13 19:56:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:18,868 INFO L482 AbstractCegarLoop]: Abstraction has 4377 states and 19549 transitions. [2021-07-13 19:56:18,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 19549 transitions. [2021-07-13 19:56:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:18,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:18,875 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:19,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:19,075 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -419262112, now seen corresponding path program 8 times [2021-07-13 19:56:19,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:19,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214379352] [2021-07-13 19:56:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:19,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:19,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214379352] [2021-07-13 19:56:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214379352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:19,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570357912] [2021-07-13 19:56:19,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:19,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:19,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:56:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:19,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:19,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:56:19,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:19,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:19,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:19,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:56:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:19,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570357912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:19,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:19,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:56:19,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921730367] [2021-07-13 19:56:19,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:19,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:19,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:19,468 INFO L87 Difference]: Start difference. First operand 4377 states and 19549 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:20,912 INFO L93 Difference]: Finished difference Result 5674 states and 24710 transitions. [2021-07-13 19:56:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:56:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:20,926 INFO L225 Difference]: With dead ends: 5674 [2021-07-13 19:56:20,927 INFO L226 Difference]: Without dead ends: 5551 [2021-07-13 19:56:20,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1047.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:56:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-07-13 19:56:20,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4371. [2021-07-13 19:56:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467963386727689) internal successors, (19525), 4370 states have internal predecessors, (19525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19525 transitions. [2021-07-13 19:56:21,012 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19525 transitions. Word has length 30 [2021-07-13 19:56:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:21,012 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19525 transitions. [2021-07-13 19:56:21,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19525 transitions. [2021-07-13 19:56:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:21,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:21,020 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:21,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:21,220 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:21,221 INFO L82 PathProgramCache]: Analyzing trace with hash 352000544, now seen corresponding path program 9 times [2021-07-13 19:56:21,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:21,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47185064] [2021-07-13 19:56:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:21,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:21,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47185064] [2021-07-13 19:56:21,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47185064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:21,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846794652] [2021-07-13 19:56:21,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:21,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:56:21,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:21,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:21,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:56:21,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:21,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:21,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:21,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:56:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:21,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846794652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:21,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:21,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:56:21,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713670267] [2021-07-13 19:56:21,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:21,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:21,605 INFO L87 Difference]: Start difference. First operand 4371 states and 19525 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:23,119 INFO L93 Difference]: Finished difference Result 5665 states and 24676 transitions. [2021-07-13 19:56:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:56:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:23,133 INFO L225 Difference]: With dead ends: 5665 [2021-07-13 19:56:23,133 INFO L226 Difference]: Without dead ends: 5523 [2021-07-13 19:56:23,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1132.2ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:56:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2021-07-13 19:56:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 4372. [2021-07-13 19:56:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.468313886982384) internal successors, (19531), 4371 states have internal predecessors, (19531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 19531 transitions. [2021-07-13 19:56:23,217 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 19531 transitions. Word has length 30 [2021-07-13 19:56:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:23,217 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 19531 transitions. [2021-07-13 19:56:23,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 19531 transitions. [2021-07-13 19:56:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:23,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:23,225 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:23,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-13 19:56:23,425 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash -284466310, now seen corresponding path program 10 times [2021-07-13 19:56:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:23,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691063756] [2021-07-13 19:56:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:23,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691063756] [2021-07-13 19:56:23,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691063756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926893765] [2021-07-13 19:56:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:23,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:23,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:56:23,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:23,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:23,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:23,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:56:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:23,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926893765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:23,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:23,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:56:23,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725819435] [2021-07-13 19:56:23,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:23,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:23,738 INFO L87 Difference]: Start difference. First operand 4372 states and 19531 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:24,808 INFO L93 Difference]: Finished difference Result 5650 states and 24728 transitions. [2021-07-13 19:56:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:56:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:24,822 INFO L225 Difference]: With dead ends: 5650 [2021-07-13 19:56:24,822 INFO L226 Difference]: Without dead ends: 5586 [2021-07-13 19:56:24,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:56:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-07-13 19:56:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4369. [2021-07-13 19:56:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 4.468177655677656) internal successors, (19517), 4368 states have internal predecessors, (19517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 19517 transitions. [2021-07-13 19:56:24,906 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 19517 transitions. Word has length 30 [2021-07-13 19:56:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:24,906 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 19517 transitions. [2021-07-13 19:56:24,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 19517 transitions. [2021-07-13 19:56:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:24,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:24,914 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:25,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 19:56:25,115 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:25,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash 155432930, now seen corresponding path program 11 times [2021-07-13 19:56:25,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:25,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815867114] [2021-07-13 19:56:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815867114] [2021-07-13 19:56:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815867114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508351612] [2021-07-13 19:56:25,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:25,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:56:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:25,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:25,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-07-13 19:56:25,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:25,463 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-07-13 19:56:25,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:25,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-07-13 19:56:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508351612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:25,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:56:25,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302339868] [2021-07-13 19:56:25,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:25,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:25,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:25,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:25,555 INFO L87 Difference]: Start difference. First operand 4369 states and 19517 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:27,669 INFO L93 Difference]: Finished difference Result 5952 states and 25747 transitions. [2021-07-13 19:56:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:56:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:27,684 INFO L225 Difference]: With dead ends: 5952 [2021-07-13 19:56:27,684 INFO L226 Difference]: Without dead ends: 5713 [2021-07-13 19:56:27,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1404.9ms TimeCoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:56:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-07-13 19:56:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 4406. [2021-07-13 19:56:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 4.465380249716231) internal successors, (19670), 4405 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 19670 transitions. [2021-07-13 19:56:27,767 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 19670 transitions. Word has length 30 [2021-07-13 19:56:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:27,768 INFO L482 AbstractCegarLoop]: Abstraction has 4406 states and 19670 transitions. [2021-07-13 19:56:27,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 19670 transitions. [2021-07-13 19:56:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:27,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:27,775 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:27,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 19:56:27,976 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1021088382, now seen corresponding path program 4 times [2021-07-13 19:56:27,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:27,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581673076] [2021-07-13 19:56:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:28,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581673076] [2021-07-13 19:56:28,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581673076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23497970] [2021-07-13 19:56:28,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:28,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:28,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:28,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:28,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:56:28,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:28,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:28,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:28,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:56:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23497970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:28,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:56:28,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321315785] [2021-07-13 19:56:28,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:28,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:28,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:28,340 INFO L87 Difference]: Start difference. First operand 4406 states and 19670 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:29,748 INFO L93 Difference]: Finished difference Result 6128 states and 26578 transitions. [2021-07-13 19:56:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:56:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:29,762 INFO L225 Difference]: With dead ends: 6128 [2021-07-13 19:56:29,763 INFO L226 Difference]: Without dead ends: 5976 [2021-07-13 19:56:29,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 927.4ms TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-07-13 19:56:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4393. [2021-07-13 19:56:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4392 states have (on average 4.466074681238616) internal successors, (19615), 4392 states have internal predecessors, (19615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 19615 transitions. [2021-07-13 19:56:29,844 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 19615 transitions. Word has length 30 [2021-07-13 19:56:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:29,844 INFO L482 AbstractCegarLoop]: Abstraction has 4393 states and 19615 transitions. [2021-07-13 19:56:29,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 19615 transitions. [2021-07-13 19:56:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:29,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:29,851 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:30,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,052 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash -113313498, now seen corresponding path program 12 times [2021-07-13 19:56:30,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:30,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079487063] [2021-07-13 19:56:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:30,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079487063] [2021-07-13 19:56:30,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079487063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228433579] [2021-07-13 19:56:30,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:56:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:30,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:56:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-07-13 19:56:30,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,478 INFO L628 ElimStorePlain]: treesize reduction 29, result has 58.6 percent of original size [2021-07-13 19:56:30,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:42 [2021-07-13 19:56:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228433579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:30,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:56:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874937435] [2021-07-13 19:56:30,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:30,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:30,575 INFO L87 Difference]: Start difference. First operand 4393 states and 19615 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:32,356 INFO L93 Difference]: Finished difference Result 5726 states and 24922 transitions. [2021-07-13 19:56:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:56:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:32,370 INFO L225 Difference]: With dead ends: 5726 [2021-07-13 19:56:32,370 INFO L226 Difference]: Without dead ends: 5572 [2021-07-13 19:56:32,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1264.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2295, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:56:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2021-07-13 19:56:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4394. [2021-07-13 19:56:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4393 states have (on average 4.46642385613476) internal successors, (19621), 4393 states have internal predecessors, (19621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 19621 transitions. [2021-07-13 19:56:32,447 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 19621 transitions. Word has length 30 [2021-07-13 19:56:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:32,447 INFO L482 AbstractCegarLoop]: Abstraction has 4394 states and 19621 transitions. [2021-07-13 19:56:32,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 19621 transitions. [2021-07-13 19:56:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:32,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:32,455 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:32,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,657 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -749780352, now seen corresponding path program 13 times [2021-07-13 19:56:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414530976] [2021-07-13 19:56:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414530976] [2021-07-13 19:56:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414530976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776624486] [2021-07-13 19:56:32,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:32,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:56:32,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:32,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:56:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776624486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:32,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:56:32,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978685547] [2021-07-13 19:56:32,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:32,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:32,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:32,971 INFO L87 Difference]: Start difference. First operand 4394 states and 19621 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:34,331 INFO L93 Difference]: Finished difference Result 5770 states and 25242 transitions. [2021-07-13 19:56:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:56:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:34,344 INFO L225 Difference]: With dead ends: 5770 [2021-07-13 19:56:34,344 INFO L226 Difference]: Without dead ends: 5690 [2021-07-13 19:56:34,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:56:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-07-13 19:56:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4373. [2021-07-13 19:56:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 4372 states have (on average 4.469121683440073) internal successors, (19539), 4372 states have internal predecessors, (19539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 19539 transitions. [2021-07-13 19:56:34,420 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 19539 transitions. Word has length 30 [2021-07-13 19:56:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:34,420 INFO L482 AbstractCegarLoop]: Abstraction has 4373 states and 19539 transitions. [2021-07-13 19:56:34,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 19539 transitions. [2021-07-13 19:56:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:34,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:34,428 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:34,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-13 19:56:34,632 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1582606780, now seen corresponding path program 1 times [2021-07-13 19:56:34,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:34,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994301828] [2021-07-13 19:56:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:34,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:34,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994301828] [2021-07-13 19:56:34,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994301828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:34,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765713463] [2021-07-13 19:56:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:34,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:34,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:34,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:34,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:34,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:34,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:34,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:34,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:56:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:34,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765713463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:34,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:34,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:34,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024222195] [2021-07-13 19:56:34,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:34,978 INFO L87 Difference]: Start difference. First operand 4373 states and 19539 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:35,773 INFO L93 Difference]: Finished difference Result 5093 states and 22395 transitions. [2021-07-13 19:56:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:35,785 INFO L225 Difference]: With dead ends: 5093 [2021-07-13 19:56:35,786 INFO L226 Difference]: Without dead ends: 5020 [2021-07-13 19:56:35,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:35,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2021-07-13 19:56:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 4418. [2021-07-13 19:56:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4417 states have (on average 4.470455059995472) internal successors, (19746), 4417 states have internal predecessors, (19746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 19746 transitions. [2021-07-13 19:56:35,891 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 19746 transitions. Word has length 30 [2021-07-13 19:56:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:35,891 INFO L482 AbstractCegarLoop]: Abstraction has 4418 states and 19746 transitions. [2021-07-13 19:56:35,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 19746 transitions. [2021-07-13 19:56:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:35,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:35,899 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:36,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:36,099 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1186289438, now seen corresponding path program 2 times [2021-07-13 19:56:36,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:36,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805275251] [2021-07-13 19:56:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:36,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:36,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805275251] [2021-07-13 19:56:36,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805275251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:36,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150925631] [2021-07-13 19:56:36,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:36,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:36,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:36,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:36,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:36,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:36,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:56:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150925631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:36,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:36,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199538711] [2021-07-13 19:56:36,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:36,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:36,442 INFO L87 Difference]: Start difference. First operand 4418 states and 19746 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:37,027 INFO L93 Difference]: Finished difference Result 5116 states and 22506 transitions. [2021-07-13 19:56:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:37,040 INFO L225 Difference]: With dead ends: 5116 [2021-07-13 19:56:37,040 INFO L226 Difference]: Without dead ends: 5041 [2021-07-13 19:56:37,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5041 states. [2021-07-13 19:56:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5041 to 4407. [2021-07-13 19:56:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 4.470721743077622) internal successors, (19698), 4406 states have internal predecessors, (19698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 19698 transitions. [2021-07-13 19:56:37,119 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 19698 transitions. Word has length 30 [2021-07-13 19:56:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:37,120 INFO L482 AbstractCegarLoop]: Abstraction has 4407 states and 19698 transitions. [2021-07-13 19:56:37,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 19698 transitions. [2021-07-13 19:56:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:37,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:37,127 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:37,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:37,328 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1423372772, now seen corresponding path program 14 times [2021-07-13 19:56:37,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:37,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398496238] [2021-07-13 19:56:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:37,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398496238] [2021-07-13 19:56:37,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398496238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641268888] [2021-07-13 19:56:37,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:37,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:37,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:37,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:37,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:37,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:37,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:37,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:37,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:37,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:37,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:56:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641268888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:37,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 19:56:37,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600244826] [2021-07-13 19:56:37,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:37,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:37,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:37,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:37,728 INFO L87 Difference]: Start difference. First operand 4407 states and 19698 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:38,372 INFO L93 Difference]: Finished difference Result 4920 states and 21711 transitions. [2021-07-13 19:56:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:56:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:38,384 INFO L225 Difference]: With dead ends: 4920 [2021-07-13 19:56:38,384 INFO L226 Difference]: Without dead ends: 4847 [2021-07-13 19:56:38,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-07-13 19:56:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 4419. [2021-07-13 19:56:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 4.469895880488909) internal successors, (19748), 4418 states have internal predecessors, (19748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 19748 transitions. [2021-07-13 19:56:38,462 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 19748 transitions. Word has length 30 [2021-07-13 19:56:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:38,462 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 19748 transitions. [2021-07-13 19:56:38,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 19748 transitions. [2021-07-13 19:56:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:38,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:38,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:38,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-13 19:56:38,670 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash -802888706, now seen corresponding path program 15 times [2021-07-13 19:56:38,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:38,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874922904] [2021-07-13 19:56:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:38,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:38,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874922904] [2021-07-13 19:56:38,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874922904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:38,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821279035] [2021-07-13 19:56:38,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:38,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:56:38,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:38,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:38,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:39,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:39,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:39,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:39,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:39,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 19:56:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:39,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821279035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:39,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:39,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 19:56:39,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586754621] [2021-07-13 19:56:39,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:39,073 INFO L87 Difference]: Start difference. First operand 4419 states and 19748 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:39,730 INFO L93 Difference]: Finished difference Result 4939 states and 21819 transitions. [2021-07-13 19:56:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:56:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:39,743 INFO L225 Difference]: With dead ends: 4939 [2021-07-13 19:56:39,743 INFO L226 Difference]: Without dead ends: 4873 [2021-07-13 19:56:39,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-07-13 19:56:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4413. [2021-07-13 19:56:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 4.470534904805077) internal successors, (19724), 4412 states have internal predecessors, (19724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 19724 transitions. [2021-07-13 19:56:39,823 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 19724 transitions. Word has length 30 [2021-07-13 19:56:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:39,823 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 19724 transitions. [2021-07-13 19:56:39,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 19724 transitions. [2021-07-13 19:56:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:39,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:39,831 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:40,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:40,031 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:40,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1558152092, now seen corresponding path program 16 times [2021-07-13 19:56:40,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:40,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048356907] [2021-07-13 19:56:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048356907] [2021-07-13 19:56:40,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048356907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088844006] [2021-07-13 19:56:40,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:40,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:40,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:40,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:40,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:56:40,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:40,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 19:56:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088844006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:40,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:40,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504953749] [2021-07-13 19:56:40,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:40,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:40,519 INFO L87 Difference]: Start difference. First operand 4413 states and 19724 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:41,632 INFO L93 Difference]: Finished difference Result 5287 states and 23188 transitions. [2021-07-13 19:56:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:56:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:41,645 INFO L225 Difference]: With dead ends: 5287 [2021-07-13 19:56:41,645 INFO L226 Difference]: Without dead ends: 5223 [2021-07-13 19:56:41,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 731.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:56:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-07-13 19:56:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4412. [2021-07-13 19:56:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 4.471094989798232) internal successors, (19722), 4411 states have internal predecessors, (19722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 19722 transitions. [2021-07-13 19:56:41,726 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 19722 transitions. Word has length 30 [2021-07-13 19:56:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 4412 states and 19722 transitions. [2021-07-13 19:56:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 19722 transitions. [2021-07-13 19:56:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:41,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:41,734 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:41,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:41,935 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 609639870, now seen corresponding path program 17 times [2021-07-13 19:56:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:41,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174827137] [2021-07-13 19:56:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:42,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174827137] [2021-07-13 19:56:42,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174827137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621047769] [2021-07-13 19:56:42,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:42,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:42,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:42,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:42,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:42,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:42,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:42,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:56:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621047769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:42,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 19:56:42,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094958314] [2021-07-13 19:56:42,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:42,395 INFO L87 Difference]: Start difference. First operand 4412 states and 19722 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:43,386 INFO L93 Difference]: Finished difference Result 4868 states and 21508 transitions. [2021-07-13 19:56:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:43,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:43,399 INFO L225 Difference]: With dead ends: 4868 [2021-07-13 19:56:43,399 INFO L226 Difference]: Without dead ends: 4795 [2021-07-13 19:56:43,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 718.1ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:56:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-07-13 19:56:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 4424. [2021-07-13 19:56:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 4.470495139045896) internal successors, (19773), 4423 states have internal predecessors, (19773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 19773 transitions. [2021-07-13 19:56:43,479 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 19773 transitions. Word has length 30 [2021-07-13 19:56:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:43,479 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 19773 transitions. [2021-07-13 19:56:43,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 19773 transitions. [2021-07-13 19:56:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:43,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:43,487 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:43,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:43,688 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2135710948, now seen corresponding path program 18 times [2021-07-13 19:56:43,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:43,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073458771] [2021-07-13 19:56:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:43,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073458771] [2021-07-13 19:56:43,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073458771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169708788] [2021-07-13 19:56:43,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:43,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:56:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:56:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:44,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:44,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:44,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:44,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 42 [2021-07-13 19:56:44,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:44,151 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-07-13 19:56:44,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:44,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:307 [2021-07-13 19:56:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169708788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:44,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:56:44,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222905902] [2021-07-13 19:56:44,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:44,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:44,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:44,423 INFO L87 Difference]: Start difference. First operand 4424 states and 19773 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:46,269 INFO L93 Difference]: Finished difference Result 4777 states and 21139 transitions. [2021-07-13 19:56:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:56:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:46,281 INFO L225 Difference]: With dead ends: 4777 [2021-07-13 19:56:46,281 INFO L226 Difference]: Without dead ends: 4700 [2021-07-13 19:56:46,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1237.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:56:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2021-07-13 19:56:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 4441. [2021-07-13 19:56:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 4440 states have (on average 4.467567567567568) internal successors, (19836), 4440 states have internal predecessors, (19836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 19836 transitions. [2021-07-13 19:56:46,357 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 19836 transitions. Word has length 30 [2021-07-13 19:56:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:46,357 INFO L482 AbstractCegarLoop]: Abstraction has 4441 states and 19836 transitions. [2021-07-13 19:56:46,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 19836 transitions. [2021-07-13 19:56:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:46,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:46,365 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:46,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,566 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1940963420, now seen corresponding path program 19 times [2021-07-13 19:56:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470187185] [2021-07-13 19:56:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:46,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470187185] [2021-07-13 19:56:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470187185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52402433] [2021-07-13 19:56:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:46,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:46,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:46,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:46,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:46,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:46,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:56:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:47,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52402433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:47,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:47,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 19:56:47,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295372180] [2021-07-13 19:56:47,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:56:47,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:47,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:56:47,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:47,041 INFO L87 Difference]: Start difference. First operand 4441 states and 19836 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:47,859 INFO L93 Difference]: Finished difference Result 4857 states and 21469 transitions. [2021-07-13 19:56:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:47,871 INFO L225 Difference]: With dead ends: 4857 [2021-07-13 19:56:47,871 INFO L226 Difference]: Without dead ends: 4784 [2021-07-13 19:56:47,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 572.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4784 states. [2021-07-13 19:56:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4784 to 4447. [2021-07-13 19:56:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 4.46693657219973) internal successors, (19860), 4446 states have internal predecessors, (19860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 19860 transitions. [2021-07-13 19:56:47,950 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 19860 transitions. Word has length 30 [2021-07-13 19:56:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:47,950 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 19860 transitions. [2021-07-13 19:56:47,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 19860 transitions. [2021-07-13 19:56:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:47,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:47,958 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:48,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:48,158 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1320479354, now seen corresponding path program 20 times [2021-07-13 19:56:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:48,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120526733] [2021-07-13 19:56:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:48,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120526733] [2021-07-13 19:56:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120526733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611404088] [2021-07-13 19:56:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:48,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:48,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:48,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:48,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:48,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:48,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:48,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:48,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:48,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:56:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:48,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611404088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:48,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:48,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-13 19:56:48,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204375545] [2021-07-13 19:56:48,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:48,599 INFO L87 Difference]: Start difference. First operand 4447 states and 19860 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:49,405 INFO L93 Difference]: Finished difference Result 4965 states and 21923 transitions. [2021-07-13 19:56:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:49,418 INFO L225 Difference]: With dead ends: 4965 [2021-07-13 19:56:49,418 INFO L226 Difference]: Without dead ends: 4899 [2021-07-13 19:56:49,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-07-13 19:56:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4441. [2021-07-13 19:56:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4441 states, 4440 states have (on average 4.467567567567568) internal successors, (19836), 4440 states have internal predecessors, (19836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4441 states to 4441 states and 19836 transitions. [2021-07-13 19:56:49,499 INFO L78 Accepts]: Start accepts. Automaton has 4441 states and 19836 transitions. Word has length 30 [2021-07-13 19:56:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:49,500 INFO L482 AbstractCegarLoop]: Abstraction has 4441 states and 19836 transitions. [2021-07-13 19:56:49,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4441 states and 19836 transitions. [2021-07-13 19:56:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:49,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:49,508 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:49,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:49,708 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:49,709 INFO L82 PathProgramCache]: Analyzing trace with hash -549216698, now seen corresponding path program 21 times [2021-07-13 19:56:49,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:49,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674918597] [2021-07-13 19:56:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:49,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:49,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674918597] [2021-07-13 19:56:49,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674918597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:49,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421785031] [2021-07-13 19:56:49,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:49,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:56:49,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:50,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:50,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:50,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:50,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:50,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:50,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:56:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421785031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:50,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:50,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:50,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263965012] [2021-07-13 19:56:50,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:50,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:50,176 INFO L87 Difference]: Start difference. First operand 4441 states and 19836 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:51,143 INFO L93 Difference]: Finished difference Result 4991 states and 22020 transitions. [2021-07-13 19:56:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:51,156 INFO L225 Difference]: With dead ends: 4991 [2021-07-13 19:56:51,156 INFO L226 Difference]: Without dead ends: 4920 [2021-07-13 19:56:51,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 724.8ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:56:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-07-13 19:56:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 4442. [2021-07-13 19:56:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 4441 states have (on average 4.467912632290025) internal successors, (19842), 4441 states have internal predecessors, (19842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 19842 transitions. [2021-07-13 19:56:51,253 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 19842 transitions. Word has length 30 [2021-07-13 19:56:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:51,253 INFO L482 AbstractCegarLoop]: Abstraction has 4442 states and 19842 transitions. [2021-07-13 19:56:51,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 19842 transitions. [2021-07-13 19:56:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:51,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:51,262 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:51,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-07-13 19:56:51,463 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1185683552, now seen corresponding path program 22 times [2021-07-13 19:56:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:51,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790453237] [2021-07-13 19:56:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790453237] [2021-07-13 19:56:51,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790453237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895968405] [2021-07-13 19:56:51,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:51,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:51,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 19:56:51,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:51,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 19:56:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895968405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:51,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168975115] [2021-07-13 19:56:51,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:51,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:51,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:51,986 INFO L87 Difference]: Start difference. First operand 4442 states and 19842 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:52,929 INFO L93 Difference]: Finished difference Result 4969 states and 21938 transitions. [2021-07-13 19:56:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:52,943 INFO L225 Difference]: With dead ends: 4969 [2021-07-13 19:56:52,943 INFO L226 Difference]: Without dead ends: 4905 [2021-07-13 19:56:52,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:56:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2021-07-13 19:56:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 4439. [2021-07-13 19:56:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4439 states, 4438 states have (on average 4.467778278503831) internal successors, (19828), 4438 states have internal predecessors, (19828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4439 states to 4439 states and 19828 transitions. [2021-07-13 19:56:53,027 INFO L78 Accepts]: Start accepts. Automaton has 4439 states and 19828 transitions. Word has length 30 [2021-07-13 19:56:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:53,028 INFO L482 AbstractCegarLoop]: Abstraction has 4439 states and 19828 transitions. [2021-07-13 19:56:53,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4439 states and 19828 transitions. [2021-07-13 19:56:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:53,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:53,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:53,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:53,236 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2049698712, now seen corresponding path program 3 times [2021-07-13 19:56:53,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:53,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872646627] [2021-07-13 19:56:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:53,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:53,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872646627] [2021-07-13 19:56:53,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872646627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378231850] [2021-07-13 19:56:53,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:53,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:53,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:56:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:53,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:53,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 19:56:53,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:53,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:53,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:53,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-07-13 19:56:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:53,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378231850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:53,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-13 19:56:53,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223660148] [2021-07-13 19:56:53,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:56:53,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:56:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:53,736 INFO L87 Difference]: Start difference. First operand 4439 states and 19828 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:54,981 INFO L93 Difference]: Finished difference Result 5357 states and 23393 transitions. [2021-07-13 19:56:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:56:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:54,994 INFO L225 Difference]: With dead ends: 5357 [2021-07-13 19:56:54,995 INFO L226 Difference]: Without dead ends: 5215 [2021-07-13 19:56:54,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 810.1ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:56:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-07-13 19:56:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4449. [2021-07-13 19:56:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 4.470323741007194) internal successors, (19884), 4448 states have internal predecessors, (19884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 19884 transitions. [2021-07-13 19:56:55,077 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 19884 transitions. Word has length 30 [2021-07-13 19:56:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:55,077 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 19884 transitions. [2021-07-13 19:56:55,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 19884 transitions. [2021-07-13 19:56:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:55,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:55,085 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:55,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,286 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1184043260, now seen corresponding path program 23 times [2021-07-13 19:56:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:55,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844278641] [2021-07-13 19:56:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:55,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844278641] [2021-07-13 19:56:55,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844278641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509220868] [2021-07-13 19:56:55,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:55,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:55,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:56:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:55,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:55,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:55,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:56:55,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:55,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:55,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:55,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 19:56:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509220868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:55,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:56:55,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485902285] [2021-07-13 19:56:55,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:55,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:55,756 INFO L87 Difference]: Start difference. First operand 4449 states and 19884 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:57,054 INFO L93 Difference]: Finished difference Result 5246 states and 23038 transitions. [2021-07-13 19:56:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:56:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:57,067 INFO L225 Difference]: With dead ends: 5246 [2021-07-13 19:56:57,067 INFO L226 Difference]: Without dead ends: 5182 [2021-07-13 19:56:57,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:56:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2021-07-13 19:56:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 4449. [2021-07-13 19:56:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 4.470323741007194) internal successors, (19884), 4448 states have internal predecessors, (19884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 19884 transitions. [2021-07-13 19:56:57,143 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 19884 transitions. Word has length 30 [2021-07-13 19:56:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:57,143 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 19884 transitions. [2021-07-13 19:56:57,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 19884 transitions. [2021-07-13 19:56:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:57,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:57,151 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:57,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:57,351 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:57,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1181268604, now seen corresponding path program 24 times [2021-07-13 19:56:57,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:57,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877417290] [2021-07-13 19:56:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877417290] [2021-07-13 19:56:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877417290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920190458] [2021-07-13 19:56:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:57,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:56:57,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:56:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-13 19:56:57,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:56:57,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:57,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:57,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 19:56:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920190458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:57,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:56:57,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035982694] [2021-07-13 19:56:57,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:57,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:57,845 INFO L87 Difference]: Start difference. First operand 4449 states and 19884 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:59,694 INFO L93 Difference]: Finished difference Result 5843 states and 25521 transitions. [2021-07-13 19:56:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:56:59,694 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:59,707 INFO L225 Difference]: With dead ends: 5843 [2021-07-13 19:56:59,708 INFO L226 Difference]: Without dead ends: 5732 [2021-07-13 19:56:59,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=566, Invalid=2974, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:56:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2021-07-13 19:56:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 4460. [2021-07-13 19:56:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 4.468939224041264) internal successors, (19927), 4459 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 19927 transitions. [2021-07-13 19:56:59,790 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 19927 transitions. Word has length 30 [2021-07-13 19:56:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:59,790 INFO L482 AbstractCegarLoop]: Abstraction has 4460 states and 19927 transitions. [2021-07-13 19:56:59,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 19927 transitions. [2021-07-13 19:56:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:59,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:59,797 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:59,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:59,998 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1687614870, now seen corresponding path program 25 times [2021-07-13 19:56:59,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:59,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108794752] [2021-07-13 19:56:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:00,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108794752] [2021-07-13 19:57:00,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108794752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026648227] [2021-07-13 19:57:00,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:57:00,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:00,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 19:57:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026648227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:00,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:00,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526753160] [2021-07-13 19:57:00,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:00,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:00,426 INFO L87 Difference]: Start difference. First operand 4460 states and 19927 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:01,302 INFO L93 Difference]: Finished difference Result 5192 states and 22825 transitions. [2021-07-13 19:57:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:01,315 INFO L225 Difference]: With dead ends: 5192 [2021-07-13 19:57:01,315 INFO L226 Difference]: Without dead ends: 5128 [2021-07-13 19:57:01,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:57:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2021-07-13 19:57:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 4450. [2021-07-13 19:57:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4449 states have (on average 4.470442796133963) internal successors, (19889), 4449 states have internal predecessors, (19889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 19889 transitions. [2021-07-13 19:57:01,394 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 19889 transitions. Word has length 30 [2021-07-13 19:57:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:01,395 INFO L482 AbstractCegarLoop]: Abstraction has 4450 states and 19889 transitions. [2021-07-13 19:57:01,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 19889 transitions. [2021-07-13 19:57:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:01,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:01,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:01,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 19:57:01,603 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash 705435170, now seen corresponding path program 4 times [2021-07-13 19:57:01,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:01,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116092443] [2021-07-13 19:57:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116092443] [2021-07-13 19:57:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116092443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209000161] [2021-07-13 19:57:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:01,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:01,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:57:01,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:01,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:01,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:01,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 19:57:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:01,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209000161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:01,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:01,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 19:57:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251167642] [2021-07-13 19:57:01,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:57:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:57:01,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:57:01,963 INFO L87 Difference]: Start difference. First operand 4450 states and 19889 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:02,695 INFO L93 Difference]: Finished difference Result 5159 states and 22696 transitions. [2021-07-13 19:57:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:57:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:02,708 INFO L225 Difference]: With dead ends: 5159 [2021-07-13 19:57:02,708 INFO L226 Difference]: Without dead ends: 5088 [2021-07-13 19:57:02,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-07-13 19:57:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4482. [2021-07-13 19:57:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4481 states have (on average 4.467083240348137) internal successors, (20017), 4481 states have internal predecessors, (20017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 20017 transitions. [2021-07-13 19:57:02,812 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 20017 transitions. Word has length 30 [2021-07-13 19:57:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:02,812 INFO L482 AbstractCegarLoop]: Abstraction has 4482 states and 20017 transitions. [2021-07-13 19:57:02,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 20017 transitions. [2021-07-13 19:57:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:02,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:02,820 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:03,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 19:57:03,020 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1571090622, now seen corresponding path program 26 times [2021-07-13 19:57:03,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:03,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182516569] [2021-07-13 19:57:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:03,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182516569] [2021-07-13 19:57:03,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182516569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992647330] [2021-07-13 19:57:03,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:03,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:03,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-07-13 19:57:03,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:57:03,530 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-07-13 19:57:03,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:03,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-07-13 19:57:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:03,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992647330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:03,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:03,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:57:03,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015270787] [2021-07-13 19:57:03,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:03,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:03,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:03,630 INFO L87 Difference]: Start difference. First operand 4482 states and 20017 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:05,517 INFO L93 Difference]: Finished difference Result 5444 states and 23623 transitions. [2021-07-13 19:57:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:57:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:05,530 INFO L225 Difference]: With dead ends: 5444 [2021-07-13 19:57:05,530 INFO L226 Difference]: Without dead ends: 5312 [2021-07-13 19:57:05,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1370.9ms TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:57:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-07-13 19:57:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 4489. [2021-07-13 19:57:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4488 states have (on average 4.465463458110517) internal successors, (20041), 4488 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 20041 transitions. [2021-07-13 19:57:05,607 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 20041 transitions. Word has length 30 [2021-07-13 19:57:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:05,607 INFO L482 AbstractCegarLoop]: Abstraction has 4489 states and 20041 transitions. [2021-07-13 19:57:05,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 20041 transitions. [2021-07-13 19:57:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:05,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:05,615 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:05,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-13 19:57:05,815 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:05,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1573865278, now seen corresponding path program 27 times [2021-07-13 19:57:05,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:05,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990886739] [2021-07-13 19:57:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:05,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:05,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990886739] [2021-07-13 19:57:05,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990886739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:05,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154276139] [2021-07-13 19:57:05,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:06,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:57:06,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:06,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-07-13 19:57:06,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:57:06,262 INFO L628 ElimStorePlain]: treesize reduction 14, result has 73.6 percent of original size [2021-07-13 19:57:06,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:06,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-07-13 19:57:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154276139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:06,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:06,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 19:57:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082661531] [2021-07-13 19:57:06,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:06,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:06,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:06,402 INFO L87 Difference]: Start difference. First operand 4489 states and 20041 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:08,212 INFO L93 Difference]: Finished difference Result 5454 states and 23694 transitions. [2021-07-13 19:57:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:57:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:08,225 INFO L225 Difference]: With dead ends: 5454 [2021-07-13 19:57:08,225 INFO L226 Difference]: Without dead ends: 5296 [2021-07-13 19:57:08,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1353.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:57:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-07-13 19:57:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 4531. [2021-07-13 19:57:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4531 states, 4530 states have (on average 4.458057395143488) internal successors, (20195), 4530 states have internal predecessors, (20195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 20195 transitions. [2021-07-13 19:57:08,302 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 20195 transitions. Word has length 30 [2021-07-13 19:57:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:08,302 INFO L482 AbstractCegarLoop]: Abstraction has 4531 states and 20195 transitions. [2021-07-13 19:57:08,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 20195 transitions. [2021-07-13 19:57:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:08,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:08,310 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:08,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:08,510 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1067519012, now seen corresponding path program 28 times [2021-07-13 19:57:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:08,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084406497] [2021-07-13 19:57:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:08,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084406497] [2021-07-13 19:57:08,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084406497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270507161] [2021-07-13 19:57:08,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:08,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:08,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:08,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:08,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 19:57:08,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:08,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:08,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:08,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 19:57:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270507161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:08,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:57:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552933098] [2021-07-13 19:57:08,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:08,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:08,938 INFO L87 Difference]: Start difference. First operand 4531 states and 20195 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:09,846 INFO L93 Difference]: Finished difference Result 5414 states and 23685 transitions. [2021-07-13 19:57:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:09,858 INFO L225 Difference]: With dead ends: 5414 [2021-07-13 19:57:09,858 INFO L226 Difference]: Without dead ends: 5350 [2021-07-13 19:57:09,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:57:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-07-13 19:57:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 4524. [2021-07-13 19:57:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 4.459650674331196) internal successors, (20171), 4523 states have internal predecessors, (20171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 20171 transitions. [2021-07-13 19:57:09,935 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 20171 transitions. Word has length 30 [2021-07-13 19:57:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:09,935 INFO L482 AbstractCegarLoop]: Abstraction has 4524 states and 20171 transitions. [2021-07-13 19:57:09,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 20171 transitions. [2021-07-13 19:57:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:09,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:09,943 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:10,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:10,143 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:10,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1348670500, now seen corresponding path program 29 times [2021-07-13 19:57:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:10,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317079708] [2021-07-13 19:57:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:10,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317079708] [2021-07-13 19:57:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317079708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455556515] [2021-07-13 19:57:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:10,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:10,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2021-07-13 19:57:10,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:57:10,555 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-07-13 19:57:10,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:10,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-07-13 19:57:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455556515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:10,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:10,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:57:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113868200] [2021-07-13 19:57:10,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:10,627 INFO L87 Difference]: Start difference. First operand 4524 states and 20171 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:11,847 INFO L93 Difference]: Finished difference Result 6034 states and 26173 transitions. [2021-07-13 19:57:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:57:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:11,887 INFO L225 Difference]: With dead ends: 6034 [2021-07-13 19:57:11,887 INFO L226 Difference]: Without dead ends: 5807 [2021-07-13 19:57:11,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 747.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:57:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2021-07-13 19:57:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 4548. [2021-07-13 19:57:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 4.455904992302617) internal successors, (20261), 4547 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 20261 transitions. [2021-07-13 19:57:11,962 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 20261 transitions. Word has length 30 [2021-07-13 19:57:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:11,962 INFO L482 AbstractCegarLoop]: Abstraction has 4548 states and 20261 transitions. [2021-07-13 19:57:11,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 20261 transitions. [2021-07-13 19:57:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:11,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:11,970 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:12,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-07-13 19:57:12,171 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash 336756796, now seen corresponding path program 5 times [2021-07-13 19:57:12,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:12,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365214503] [2021-07-13 19:57:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:12,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:12,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365214503] [2021-07-13 19:57:12,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365214503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:12,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399734748] [2021-07-13 19:57:12,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:12,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:12,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:12,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:12,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:12,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:12,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:57:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:12,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399734748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:12,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:12,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128540924] [2021-07-13 19:57:12,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:12,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:12,537 INFO L87 Difference]: Start difference. First operand 4548 states and 20261 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:13,780 INFO L93 Difference]: Finished difference Result 6200 states and 27089 transitions. [2021-07-13 19:57:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:57:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:13,797 INFO L225 Difference]: With dead ends: 6200 [2021-07-13 19:57:13,797 INFO L226 Difference]: Without dead ends: 6129 [2021-07-13 19:57:13,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 773.3ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2021-07-13 19:57:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 4540. [2021-07-13 19:57:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 4.45714915179555) internal successors, (20231), 4539 states have internal predecessors, (20231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 20231 transitions. [2021-07-13 19:57:13,891 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 20231 transitions. Word has length 30 [2021-07-13 19:57:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:13,891 INFO L482 AbstractCegarLoop]: Abstraction has 4540 states and 20231 transitions. [2021-07-13 19:57:13,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 20231 transitions. [2021-07-13 19:57:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:13,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:13,958 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:14,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-13 19:57:14,169 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1791569640, now seen corresponding path program 30 times [2021-07-13 19:57:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:14,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613522177] [2021-07-13 19:57:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:14,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613522177] [2021-07-13 19:57:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613522177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:14,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679955658] [2021-07-13 19:57:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:14,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:14,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:14,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:14,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:14,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:14,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:14,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:14,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-07-13 19:57:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:14,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679955658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:14,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:14,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:57:14,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274100732] [2021-07-13 19:57:14,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:14,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:14,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:14,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:14,607 INFO L87 Difference]: Start difference. First operand 4540 states and 20231 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:15,858 INFO L93 Difference]: Finished difference Result 5726 states and 25059 transitions. [2021-07-13 19:57:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:15,872 INFO L225 Difference]: With dead ends: 5726 [2021-07-13 19:57:15,872 INFO L226 Difference]: Without dead ends: 5655 [2021-07-13 19:57:15,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 850.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:57:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2021-07-13 19:57:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 4540. [2021-07-13 19:57:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4540 states, 4539 states have (on average 4.45714915179555) internal successors, (20231), 4539 states have internal predecessors, (20231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 20231 transitions. [2021-07-13 19:57:15,961 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 20231 transitions. Word has length 30 [2021-07-13 19:57:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:15,961 INFO L482 AbstractCegarLoop]: Abstraction has 4540 states and 20231 transitions. [2021-07-13 19:57:15,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 20231 transitions. [2021-07-13 19:57:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:15,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:15,969 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:16,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-13 19:57:16,184 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1997051390, now seen corresponding path program 31 times [2021-07-13 19:57:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:16,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585572143] [2021-07-13 19:57:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:16,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:16,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585572143] [2021-07-13 19:57:16,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585572143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:16,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907096656] [2021-07-13 19:57:16,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:16,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:16,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:16,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:16,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:16,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:57:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:16,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907096656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:16,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:16,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:16,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873228588] [2021-07-13 19:57:16,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:16,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:16,641 INFO L87 Difference]: Start difference. First operand 4540 states and 20231 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:18,232 INFO L93 Difference]: Finished difference Result 5913 states and 25914 transitions. [2021-07-13 19:57:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:57:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:18,247 INFO L225 Difference]: With dead ends: 5913 [2021-07-13 19:57:18,247 INFO L226 Difference]: Without dead ends: 5849 [2021-07-13 19:57:18,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1003.1ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2021-07-13 19:57:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 4524. [2021-07-13 19:57:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 4.459650674331196) internal successors, (20171), 4523 states have internal predecessors, (20171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 20171 transitions. [2021-07-13 19:57:18,331 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 20171 transitions. Word has length 30 [2021-07-13 19:57:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:18,332 INFO L482 AbstractCegarLoop]: Abstraction has 4524 states and 20171 transitions. [2021-07-13 19:57:18,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 20171 transitions. [2021-07-13 19:57:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:18,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:18,339 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:18,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:57:18,555 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -276647388, now seen corresponding path program 32 times [2021-07-13 19:57:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:18,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124388569] [2021-07-13 19:57:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:18,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:18,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124388569] [2021-07-13 19:57:18,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124388569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:18,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876426385] [2021-07-13 19:57:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:18,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:19,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:19,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-13 19:57:19,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:19,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:19,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:19,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-07-13 19:57:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:19,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876426385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:19,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:19,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 19:57:19,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279990480] [2021-07-13 19:57:19,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:19,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:19,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:19,241 INFO L87 Difference]: Start difference. First operand 4524 states and 20171 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:20,761 INFO L93 Difference]: Finished difference Result 5027 states and 22085 transitions. [2021-07-13 19:57:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:57:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:20,773 INFO L225 Difference]: With dead ends: 5027 [2021-07-13 19:57:20,773 INFO L226 Difference]: Without dead ends: 4959 [2021-07-13 19:57:20,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1195.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:57:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-07-13 19:57:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4518. [2021-07-13 19:57:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4518 states, 4517 states have (on average 4.460261235333186) internal successors, (20147), 4517 states have internal predecessors, (20147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 20147 transitions. [2021-07-13 19:57:20,854 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 20147 transitions. Word has length 30 [2021-07-13 19:57:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:20,854 INFO L482 AbstractCegarLoop]: Abstraction has 4518 states and 20147 transitions. [2021-07-13 19:57:20,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 20147 transitions. [2021-07-13 19:57:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:20,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:20,862 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:21,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-13 19:57:21,077 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506824, now seen corresponding path program 33 times [2021-07-13 19:57:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:21,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566563857] [2021-07-13 19:57:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566563857] [2021-07-13 19:57:21,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566563857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500384685] [2021-07-13 19:57:21,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:21,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:57:21,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:21,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-13 19:57:21,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:21,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:21,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:21,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-07-13 19:57:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500384685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:21,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 19:57:21,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296450212] [2021-07-13 19:57:21,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:21,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:21,771 INFO L87 Difference]: Start difference. First operand 4518 states and 20147 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:23,844 INFO L93 Difference]: Finished difference Result 5135 states and 22523 transitions. [2021-07-13 19:57:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:57:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:23,857 INFO L225 Difference]: With dead ends: 5135 [2021-07-13 19:57:23,857 INFO L226 Difference]: Without dead ends: 5050 [2021-07-13 19:57:23,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1759.2ms TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:57:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-07-13 19:57:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 4510. [2021-07-13 19:57:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 4.4604125083167) internal successors, (20112), 4509 states have internal predecessors, (20112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 20112 transitions. [2021-07-13 19:57:23,946 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 20112 transitions. Word has length 30 [2021-07-13 19:57:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:23,946 INFO L482 AbstractCegarLoop]: Abstraction has 4510 states and 20112 transitions. [2021-07-13 19:57:23,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 20112 transitions. [2021-07-13 19:57:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:23,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:23,954 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:24,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:24,155 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash 855600944, now seen corresponding path program 57 times [2021-07-13 19:57:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:24,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245169777] [2021-07-13 19:57:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:24,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:24,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245169777] [2021-07-13 19:57:24,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245169777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:24,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759820028] [2021-07-13 19:57:24,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:24,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:24,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:24,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:24,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:24,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:24,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:57:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:24,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759820028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:24,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:24,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576251916] [2021-07-13 19:57:24,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:24,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:24,523 INFO L87 Difference]: Start difference. First operand 4510 states and 20112 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:25,862 INFO L93 Difference]: Finished difference Result 6552 states and 28211 transitions. [2021-07-13 19:57:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:57:25,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:25,878 INFO L225 Difference]: With dead ends: 6552 [2021-07-13 19:57:25,878 INFO L226 Difference]: Without dead ends: 6254 [2021-07-13 19:57:25,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 915.1ms TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:57:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6254 states. [2021-07-13 19:57:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6254 to 4572. [2021-07-13 19:57:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 4.452854955152046) internal successors, (20354), 4571 states have internal predecessors, (20354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 20354 transitions. [2021-07-13 19:57:25,965 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 20354 transitions. Word has length 30 [2021-07-13 19:57:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:25,966 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 20354 transitions. [2021-07-13 19:57:25,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 20354 transitions. [2021-07-13 19:57:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:25,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:25,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:26,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-13 19:57:26,174 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2134626958, now seen corresponding path program 37 times [2021-07-13 19:57:26,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:26,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676092488] [2021-07-13 19:57:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:26,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:26,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676092488] [2021-07-13 19:57:26,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676092488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:26,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375433848] [2021-07-13 19:57:26,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:26,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:26,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:26,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:26,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:57:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:26,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375433848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:26,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:26,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:57:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366136196] [2021-07-13 19:57:26,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:26,605 INFO L87 Difference]: Start difference. First operand 4572 states and 20354 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:28,262 INFO L93 Difference]: Finished difference Result 6118 states and 26556 transitions. [2021-07-13 19:57:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:57:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:28,277 INFO L225 Difference]: With dead ends: 6118 [2021-07-13 19:57:28,277 INFO L226 Difference]: Without dead ends: 5951 [2021-07-13 19:57:28,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1294.7ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:57:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-07-13 19:57:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4576. [2021-07-13 19:57:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.4485245901639345) internal successors, (20352), 4575 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 20352 transitions. [2021-07-13 19:57:28,360 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 20352 transitions. Word has length 30 [2021-07-13 19:57:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:28,360 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 20352 transitions. [2021-07-13 19:57:28,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 20352 transitions. [2021-07-13 19:57:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:28,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:28,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:28,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-13 19:57:28,573 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash 274105212, now seen corresponding path program 58 times [2021-07-13 19:57:28,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:28,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364856120] [2021-07-13 19:57:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:28,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:28,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364856120] [2021-07-13 19:57:28,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364856120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:28,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381224373] [2021-07-13 19:57:28,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:28,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:28,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:28,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:28,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:28,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:28,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:28,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381224373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:28,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:28,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:57:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949856438] [2021-07-13 19:57:28,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:28,924 INFO L87 Difference]: Start difference. First operand 4576 states and 20352 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:30,254 INFO L93 Difference]: Finished difference Result 6260 states and 26996 transitions. [2021-07-13 19:57:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:57:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:30,269 INFO L225 Difference]: With dead ends: 6260 [2021-07-13 19:57:30,269 INFO L226 Difference]: Without dead ends: 6100 [2021-07-13 19:57:30,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1004.0ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:57:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-07-13 19:57:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 4622. [2021-07-13 19:57:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 4621 states have (on average 4.449469811729063) internal successors, (20561), 4621 states have internal predecessors, (20561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 20561 transitions. [2021-07-13 19:57:30,352 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 20561 transitions. Word has length 30 [2021-07-13 19:57:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:30,352 INFO L482 AbstractCegarLoop]: Abstraction has 4622 states and 20561 transitions. [2021-07-13 19:57:30,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 20561 transitions. [2021-07-13 19:57:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:30,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:30,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:30,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:30,561 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:30,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1826877156, now seen corresponding path program 59 times [2021-07-13 19:57:30,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:30,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576571785] [2021-07-13 19:57:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:30,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:30,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576571785] [2021-07-13 19:57:30,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576571785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:30,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998169832] [2021-07-13 19:57:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:30,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:57:30,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:30,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:30,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:30,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:30,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:30,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:30,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:30,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998169832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:30,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:30,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:57:30,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066513336] [2021-07-13 19:57:30,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:30,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:30,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:30,919 INFO L87 Difference]: Start difference. First operand 4622 states and 20561 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:32,385 INFO L93 Difference]: Finished difference Result 6525 states and 27927 transitions. [2021-07-13 19:57:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:57:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:32,400 INFO L225 Difference]: With dead ends: 6525 [2021-07-13 19:57:32,401 INFO L226 Difference]: Without dead ends: 6213 [2021-07-13 19:57:32,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1057.0ms TimeCoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:57:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-07-13 19:57:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 4650. [2021-07-13 19:57:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 4.4491288449128845) internal successors, (20684), 4649 states have internal predecessors, (20684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 20684 transitions. [2021-07-13 19:57:32,482 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 20684 transitions. Word has length 30 [2021-07-13 19:57:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:32,482 INFO L482 AbstractCegarLoop]: Abstraction has 4650 states and 20684 transitions. [2021-07-13 19:57:32,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 20684 transitions. [2021-07-13 19:57:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:32,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:32,490 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:32,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:32,691 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1892384642, now seen corresponding path program 38 times [2021-07-13 19:57:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:32,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884312304] [2021-07-13 19:57:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:32,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:32,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884312304] [2021-07-13 19:57:32,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884312304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:32,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18446711] [2021-07-13 19:57:32,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:32,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:32,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:32,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:32,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:57:32,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:33,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:33,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:33,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:57:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:33,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18446711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:33,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:33,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:57:33,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483460564] [2021-07-13 19:57:33,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:33,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:33,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:33,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:33,098 INFO L87 Difference]: Start difference. First operand 4650 states and 20684 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:34,914 INFO L93 Difference]: Finished difference Result 5974 states and 25851 transitions. [2021-07-13 19:57:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:57:34,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:34,928 INFO L225 Difference]: With dead ends: 5974 [2021-07-13 19:57:34,928 INFO L226 Difference]: Without dead ends: 5723 [2021-07-13 19:57:34,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1382.7ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:57:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-07-13 19:57:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4675. [2021-07-13 19:57:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 4.443089430894309) internal successors, (20767), 4674 states have internal predecessors, (20767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 20767 transitions. [2021-07-13 19:57:35,017 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 20767 transitions. Word has length 30 [2021-07-13 19:57:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:35,017 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 20767 transitions. [2021-07-13 19:57:35,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 20767 transitions. [2021-07-13 19:57:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:35,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:35,026 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:35,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:35,226 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1006995578, now seen corresponding path program 39 times [2021-07-13 19:57:35,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:35,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661554149] [2021-07-13 19:57:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:35,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:35,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661554149] [2021-07-13 19:57:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661554149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:35,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519291109] [2021-07-13 19:57:35,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:35,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:35,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:35,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:57:35,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:35,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:35,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:35,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:57:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:35,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519291109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:35,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:35,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:57:35,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595931977] [2021-07-13 19:57:35,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:35,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:35,640 INFO L87 Difference]: Start difference. First operand 4675 states and 20767 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:37,394 INFO L93 Difference]: Finished difference Result 6118 states and 26449 transitions. [2021-07-13 19:57:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:57:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:37,408 INFO L225 Difference]: With dead ends: 6118 [2021-07-13 19:57:37,408 INFO L226 Difference]: Without dead ends: 5827 [2021-07-13 19:57:37,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1348.1ms TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:57:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-07-13 19:57:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 4666. [2021-07-13 19:57:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 4665 states have (on average 4.445230439442658) internal successors, (20737), 4665 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 20737 transitions. [2021-07-13 19:57:37,490 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 20737 transitions. Word has length 30 [2021-07-13 19:57:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:37,490 INFO L482 AbstractCegarLoop]: Abstraction has 4666 states and 20737 transitions. [2021-07-13 19:57:37,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 20737 transitions. [2021-07-13 19:57:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:37,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:37,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:37,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:37,699 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 269792026, now seen corresponding path program 6 times [2021-07-13 19:57:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:37,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976010837] [2021-07-13 19:57:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:37,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:37,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976010837] [2021-07-13 19:57:37,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976010837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:37,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132782711] [2021-07-13 19:57:37,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:37,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:57:37,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:37,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:37,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:37,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:37,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:37,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:37,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:38,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132782711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:38,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:38,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:57:38,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783565593] [2021-07-13 19:57:38,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:38,034 INFO L87 Difference]: Start difference. First operand 4666 states and 20737 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:39,217 INFO L93 Difference]: Finished difference Result 6013 states and 26168 transitions. [2021-07-13 19:57:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:57:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:39,231 INFO L225 Difference]: With dead ends: 6013 [2021-07-13 19:57:39,232 INFO L226 Difference]: Without dead ends: 5895 [2021-07-13 19:57:39,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 869.5ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2021-07-13 19:57:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 4701. [2021-07-13 19:57:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4700 states have (on average 4.441063829787234) internal successors, (20873), 4700 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 20873 transitions. [2021-07-13 19:57:39,310 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 20873 transitions. Word has length 30 [2021-07-13 19:57:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:39,310 INFO L482 AbstractCegarLoop]: Abstraction has 4701 states and 20873 transitions. [2021-07-13 19:57:39,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 20873 transitions. [2021-07-13 19:57:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:39,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:39,319 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:39,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-13 19:57:39,519 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -806467874, now seen corresponding path program 7 times [2021-07-13 19:57:39,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:39,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078069600] [2021-07-13 19:57:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:39,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078069600] [2021-07-13 19:57:39,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078069600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534295455] [2021-07-13 19:57:39,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:39,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:39,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:39,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:39,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534295455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:39,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 19:57:39,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400317720] [2021-07-13 19:57:39,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:39,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:39,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:39,867 INFO L87 Difference]: Start difference. First operand 4701 states and 20873 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:41,025 INFO L93 Difference]: Finished difference Result 5924 states and 25830 transitions. [2021-07-13 19:57:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:57:41,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:41,040 INFO L225 Difference]: With dead ends: 5924 [2021-07-13 19:57:41,040 INFO L226 Difference]: Without dead ends: 5808 [2021-07-13 19:57:41,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-07-13 19:57:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4694. [2021-07-13 19:57:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4693 states have (on average 4.441721713189858) internal successors, (20845), 4693 states have internal predecessors, (20845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 20845 transitions. [2021-07-13 19:57:41,126 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 20845 transitions. Word has length 30 [2021-07-13 19:57:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:41,126 INFO L482 AbstractCegarLoop]: Abstraction has 4694 states and 20845 transitions. [2021-07-13 19:57:41,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 20845 transitions. [2021-07-13 19:57:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:41,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:41,135 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:41,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:41,335 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1424785500, now seen corresponding path program 34 times [2021-07-13 19:57:41,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:41,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867461100] [2021-07-13 19:57:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:41,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867461100] [2021-07-13 19:57:41,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867461100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731981864] [2021-07-13 19:57:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:41,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:41,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:41,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:41,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:41,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:41,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:41,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731981864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:41,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:57:41,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981812582] [2021-07-13 19:57:41,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:41,662 INFO L87 Difference]: Start difference. First operand 4694 states and 20845 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:43,085 INFO L93 Difference]: Finished difference Result 5795 states and 25319 transitions. [2021-07-13 19:57:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:57:43,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:43,099 INFO L225 Difference]: With dead ends: 5795 [2021-07-13 19:57:43,099 INFO L226 Difference]: Without dead ends: 5697 [2021-07-13 19:57:43,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1003.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-07-13 19:57:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 4706. [2021-07-13 19:57:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4705 states have (on average 4.4397449521785335) internal successors, (20889), 4705 states have internal predecessors, (20889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 20889 transitions. [2021-07-13 19:57:43,177 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 20889 transitions. Word has length 30 [2021-07-13 19:57:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:43,177 INFO L482 AbstractCegarLoop]: Abstraction has 4706 states and 20889 transitions. [2021-07-13 19:57:43,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 20889 transitions. [2021-07-13 19:57:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:43,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:43,185 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:43,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:43,386 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:43,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1344110718, now seen corresponding path program 35 times [2021-07-13 19:57:43,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:43,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344163744] [2021-07-13 19:57:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:43,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344163744] [2021-07-13 19:57:43,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344163744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283751779] [2021-07-13 19:57:43,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:43,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:43,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:43,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:43,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:43,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:43,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:43,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283751779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:43,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 19:57:43,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252506700] [2021-07-13 19:57:43,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:43,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:43,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:43,750 INFO L87 Difference]: Start difference. First operand 4706 states and 20889 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:44,779 INFO L93 Difference]: Finished difference Result 5670 states and 24843 transitions. [2021-07-13 19:57:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:57:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:44,792 INFO L225 Difference]: With dead ends: 5670 [2021-07-13 19:57:44,792 INFO L226 Difference]: Without dead ends: 5567 [2021-07-13 19:57:44,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 801.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:57:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-07-13 19:57:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4698. [2021-07-13 19:57:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 4.440706834149457) internal successors, (20858), 4697 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 20858 transitions. [2021-07-13 19:57:44,872 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 20858 transitions. Word has length 30 [2021-07-13 19:57:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:44,872 INFO L482 AbstractCegarLoop]: Abstraction has 4698 states and 20858 transitions. [2021-07-13 19:57:44,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 20858 transitions. [2021-07-13 19:57:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:44,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:44,881 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:45,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,081 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash 534675360, now seen corresponding path program 36 times [2021-07-13 19:57:45,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:45,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914914162] [2021-07-13 19:57:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914914162] [2021-07-13 19:57:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914914162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139940518] [2021-07-13 19:57:45,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:57:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:45,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:45,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:45,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:45,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:45,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:45,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-13 19:57:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139940518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:45,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:57:45,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278341644] [2021-07-13 19:57:45,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:45,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:45,491 INFO L87 Difference]: Start difference. First operand 4698 states and 20858 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:47,371 INFO L93 Difference]: Finished difference Result 6105 states and 26434 transitions. [2021-07-13 19:57:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:57:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:47,386 INFO L225 Difference]: With dead ends: 6105 [2021-07-13 19:57:47,386 INFO L226 Difference]: Without dead ends: 5998 [2021-07-13 19:57:47,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1315.9ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:57:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2021-07-13 19:57:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 4714. [2021-07-13 19:57:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 4.436876723955018) internal successors, (20911), 4713 states have internal predecessors, (20911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 20911 transitions. [2021-07-13 19:57:47,469 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 20911 transitions. Word has length 30 [2021-07-13 19:57:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:47,469 INFO L482 AbstractCegarLoop]: Abstraction has 4714 states and 20911 transitions. [2021-07-13 19:57:47,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 20911 transitions. [2021-07-13 19:57:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:47,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:47,477 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:47,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:47,677 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1400330812, now seen corresponding path program 8 times [2021-07-13 19:57:47,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:47,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446406209] [2021-07-13 19:57:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:47,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:47,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446406209] [2021-07-13 19:57:47,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446406209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510145973] [2021-07-13 19:57:47,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:47,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:47,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:48,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:48,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:48,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:48,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:48,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:48,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-13 19:57:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510145973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:48,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:48,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:57:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766785412] [2021-07-13 19:57:48,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:57:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:57:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:48,109 INFO L87 Difference]: Start difference. First operand 4714 states and 20911 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:50,008 INFO L93 Difference]: Finished difference Result 6368 states and 27507 transitions. [2021-07-13 19:57:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:57:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:50,024 INFO L225 Difference]: With dead ends: 6368 [2021-07-13 19:57:50,024 INFO L226 Difference]: Without dead ends: 6140 [2021-07-13 19:57:50,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1448.4ms TimeCoverageRelationStatistics Valid=635, Invalid=2905, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:57:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6140 states. [2021-07-13 19:57:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6140 to 4696. [2021-07-13 19:57:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4695 states have (on average 4.440894568690096) internal successors, (20850), 4695 states have internal predecessors, (20850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 20850 transitions. [2021-07-13 19:57:50,111 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 20850 transitions. Word has length 30 [2021-07-13 19:57:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:50,111 INFO L482 AbstractCegarLoop]: Abstraction has 4696 states and 20850 transitions. [2021-07-13 19:57:50,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 20850 transitions. [2021-07-13 19:57:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:50,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:50,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:50,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,320 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -373359346, now seen corresponding path program 60 times [2021-07-13 19:57:50,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:50,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352682389] [2021-07-13 19:57:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:50,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352682389] [2021-07-13 19:57:50,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352682389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904664363] [2021-07-13 19:57:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:50,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:57:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:50,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:50,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 19:57:50,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:50,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:50,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:50,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-07-13 19:57:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:50,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904664363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:50,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:57:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959285840] [2021-07-13 19:57:50,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:50,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:50,736 INFO L87 Difference]: Start difference. First operand 4696 states and 20850 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:53,642 INFO L93 Difference]: Finished difference Result 9724 states and 40718 transitions. [2021-07-13 19:57:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 19:57:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:53,667 INFO L225 Difference]: With dead ends: 9724 [2021-07-13 19:57:53,667 INFO L226 Difference]: Without dead ends: 9356 [2021-07-13 19:57:53,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1970.6ms TimeCoverageRelationStatistics Valid=930, Invalid=5550, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:57:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2021-07-13 19:57:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 4897. [2021-07-13 19:57:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4896 states have (on average 4.464256535947713) internal successors, (21857), 4896 states have internal predecessors, (21857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 21857 transitions. [2021-07-13 19:57:53,793 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 21857 transitions. Word has length 30 [2021-07-13 19:57:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:53,793 INFO L482 AbstractCegarLoop]: Abstraction has 4897 states and 21857 transitions. [2021-07-13 19:57:53,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 21857 transitions. [2021-07-13 19:57:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:53,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:53,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:54,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-13 19:57:54,003 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1000486072, now seen corresponding path program 9 times [2021-07-13 19:57:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:54,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106493887] [2021-07-13 19:57:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106493887] [2021-07-13 19:57:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106493887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080286976] [2021-07-13 19:57:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:54,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:54,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:57:54,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:54,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:54,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-07-13 19:57:54,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:57:54,400 INFO L628 ElimStorePlain]: treesize reduction 62, result has 60.0 percent of original size [2021-07-13 19:57:54,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:54,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:296 [2021-07-13 19:57:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:54,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080286976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:54,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:54,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 19:57:54,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240239014] [2021-07-13 19:57:54,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:57:54,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:54,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:57:54,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:54,567 INFO L87 Difference]: Start difference. First operand 4897 states and 21857 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:56,650 INFO L93 Difference]: Finished difference Result 7955 states and 34075 transitions. [2021-07-13 19:57:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:57:56,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:56,669 INFO L225 Difference]: With dead ends: 7955 [2021-07-13 19:57:56,670 INFO L226 Difference]: Without dead ends: 7855 [2021-07-13 19:57:56,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1461.8ms TimeCoverageRelationStatistics Valid=458, Invalid=2512, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:57:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-07-13 19:57:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 4931. [2021-07-13 19:57:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 4.455983772819472) internal successors, (21968), 4930 states have internal predecessors, (21968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 21968 transitions. [2021-07-13 19:57:56,771 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 21968 transitions. Word has length 30 [2021-07-13 19:57:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:56,771 INFO L482 AbstractCegarLoop]: Abstraction has 4931 states and 21968 transitions. [2021-07-13 19:57:56,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 21968 transitions. [2021-07-13 19:57:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:56,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:56,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:56,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 19:57:56,980 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:56,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1718013794, now seen corresponding path program 10 times [2021-07-13 19:57:56,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:56,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512777111] [2021-07-13 19:57:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:57,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512777111] [2021-07-13 19:57:57,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512777111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738641885] [2021-07-13 19:57:57,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:57,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:57:57,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:57,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:57:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738641885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:57,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:57:57,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208401125] [2021-07-13 19:57:57,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:57,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:57,290 INFO L87 Difference]: Start difference. First operand 4931 states and 21968 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:59,043 INFO L93 Difference]: Finished difference Result 10254 states and 42804 transitions. [2021-07-13 19:57:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:57:59,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:57:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:59,068 INFO L225 Difference]: With dead ends: 10254 [2021-07-13 19:57:59,068 INFO L226 Difference]: Without dead ends: 9788 [2021-07-13 19:57:59,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1053.3ms TimeCoverageRelationStatistics Valid=655, Invalid=2885, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:57:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9788 states. [2021-07-13 19:57:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9788 to 5071. [2021-07-13 19:57:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 5070 states have (on average 4.461735700197239) internal successors, (22621), 5070 states have internal predecessors, (22621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 22621 transitions. [2021-07-13 19:57:59,190 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 22621 transitions. Word has length 30 [2021-07-13 19:57:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:59,190 INFO L482 AbstractCegarLoop]: Abstraction has 5071 states and 22621 transitions. [2021-07-13 19:57:59,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 22621 transitions. [2021-07-13 19:57:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:57:59,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:59,200 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:59,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:59,400 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash -457758120, now seen corresponding path program 61 times [2021-07-13 19:57:59,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:59,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743076965] [2021-07-13 19:57:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:59,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:59,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743076965] [2021-07-13 19:57:59,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743076965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922839559] [2021-07-13 19:57:59,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:57:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:59,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:57:59,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:59,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:59,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:59,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:57:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:59,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922839559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:59,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:57:59,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107206067] [2021-07-13 19:57:59,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:57:59,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:57:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:59,753 INFO L87 Difference]: Start difference. First operand 5071 states and 22621 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:02,770 INFO L93 Difference]: Finished difference Result 11610 states and 48897 transitions. [2021-07-13 19:58:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:58:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:02,800 INFO L225 Difference]: With dead ends: 11610 [2021-07-13 19:58:02,800 INFO L226 Difference]: Without dead ends: 11123 [2021-07-13 19:58:02,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 2211.2ms TimeCoverageRelationStatistics Valid=953, Invalid=5053, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 19:58:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11123 states. [2021-07-13 19:58:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11123 to 6185. [2021-07-13 19:58:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 4.532179818887451) internal successors, (28027), 6184 states have internal predecessors, (28027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 28027 transitions. [2021-07-13 19:58:02,958 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 28027 transitions. Word has length 30 [2021-07-13 19:58:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:02,958 INFO L482 AbstractCegarLoop]: Abstraction has 6185 states and 28027 transitions. [2021-07-13 19:58:02,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 28027 transitions. [2021-07-13 19:58:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:02,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:02,970 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:03,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:03,170 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:03,170 INFO L82 PathProgramCache]: Analyzing trace with hash 433531888, now seen corresponding path program 62 times [2021-07-13 19:58:03,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:03,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925442694] [2021-07-13 19:58:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:03,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925442694] [2021-07-13 19:58:03,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925442694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033138943] [2021-07-13 19:58:03,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:03,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:58:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:03,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:58:03,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:03,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:03,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:03,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:58:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033138943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:58:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209766559] [2021-07-13 19:58:03,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:03,621 INFO L87 Difference]: Start difference. First operand 6185 states and 28027 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:07,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:07,174 INFO L93 Difference]: Finished difference Result 11382 states and 48387 transitions. [2021-07-13 19:58:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 19:58:07,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:07,202 INFO L225 Difference]: With dead ends: 11382 [2021-07-13 19:58:07,202 INFO L226 Difference]: Without dead ends: 10940 [2021-07-13 19:58:07,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 2610.0ms TimeCoverageRelationStatistics Valid=907, Invalid=5573, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:58:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10940 states. [2021-07-13 19:58:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10940 to 6670. [2021-07-13 19:58:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6670 states, 6669 states have (on average 4.548208127155496) internal successors, (30332), 6669 states have internal predecessors, (30332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 30332 transitions. [2021-07-13 19:58:07,375 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 30332 transitions. Word has length 30 [2021-07-13 19:58:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:07,375 INFO L482 AbstractCegarLoop]: Abstraction has 6670 states and 30332 transitions. [2021-07-13 19:58:07,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 30332 transitions. [2021-07-13 19:58:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:07,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:07,388 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:07,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,589 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1840091556, now seen corresponding path program 11 times [2021-07-13 19:58:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:07,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601464818] [2021-07-13 19:58:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:07,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601464818] [2021-07-13 19:58:07,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601464818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923916963] [2021-07-13 19:58:07,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:58:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:58:07,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:07,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:07,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:07,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:58:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923916963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:07,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:58:07,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506334535] [2021-07-13 19:58:07,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:07,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:07,924 INFO L87 Difference]: Start difference. First operand 6670 states and 30332 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:09,683 INFO L93 Difference]: Finished difference Result 11493 states and 49267 transitions. [2021-07-13 19:58:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:58:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:09,712 INFO L225 Difference]: With dead ends: 11493 [2021-07-13 19:58:09,712 INFO L226 Difference]: Without dead ends: 11211 [2021-07-13 19:58:09,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1143.0ms TimeCoverageRelationStatistics Valid=577, Invalid=2729, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:58:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11211 states. [2021-07-13 19:58:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11211 to 6865. [2021-07-13 19:58:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6865 states, 6864 states have (on average 4.542540792540793) internal successors, (31180), 6864 states have internal predecessors, (31180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 31180 transitions. [2021-07-13 19:58:09,886 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 31180 transitions. Word has length 30 [2021-07-13 19:58:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:09,886 INFO L482 AbstractCegarLoop]: Abstraction has 6865 states and 31180 transitions. [2021-07-13 19:58:09,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 31180 transitions. [2021-07-13 19:58:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:09,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:09,899 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:10,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:10,099 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash 717133904, now seen corresponding path program 12 times [2021-07-13 19:58:10,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:10,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327933754] [2021-07-13 19:58:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:10,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:10,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327933754] [2021-07-13 19:58:10,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327933754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:10,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728433531] [2021-07-13 19:58:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:10,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:58:10,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:58:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:10,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:10,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:58:10,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:10,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:10,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:10,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:58:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728433531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:10,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:10,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 19:58:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540482168] [2021-07-13 19:58:10,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:10,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:10,451 INFO L87 Difference]: Start difference. First operand 6865 states and 31180 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:12,009 INFO L93 Difference]: Finished difference Result 11138 states and 47722 transitions. [2021-07-13 19:58:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:58:12,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:12,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:12,038 INFO L225 Difference]: With dead ends: 11138 [2021-07-13 19:58:12,038 INFO L226 Difference]: Without dead ends: 10994 [2021-07-13 19:58:12,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 987.1ms TimeCoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:58:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2021-07-13 19:58:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 6918. [2021-07-13 19:58:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6918 states, 6917 states have (on average 4.544455688882463) internal successors, (31434), 6917 states have internal predecessors, (31434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6918 states to 6918 states and 31434 transitions. [2021-07-13 19:58:12,204 INFO L78 Accepts]: Start accepts. Automaton has 6918 states and 31434 transitions. Word has length 30 [2021-07-13 19:58:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:12,204 INFO L482 AbstractCegarLoop]: Abstraction has 6918 states and 31434 transitions. [2021-07-13 19:58:12,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6918 states and 31434 transitions. [2021-07-13 19:58:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:12,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:12,217 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:12,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-13 19:58:12,418 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:12,418 INFO L82 PathProgramCache]: Analyzing trace with hash -819317232, now seen corresponding path program 40 times [2021-07-13 19:58:12,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:12,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966201800] [2021-07-13 19:58:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:12,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:12,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966201800] [2021-07-13 19:58:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966201800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:12,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239053600] [2021-07-13 19:58:12,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:12,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:12,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:12,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:12,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:12,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:58:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:12,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239053600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:12,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:12,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:58:12,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716842187] [2021-07-13 19:58:12,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:12,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:12,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:12,767 INFO L87 Difference]: Start difference. First operand 6918 states and 31434 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:14,888 INFO L93 Difference]: Finished difference Result 11496 states and 49442 transitions. [2021-07-13 19:58:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 19:58:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:14,918 INFO L225 Difference]: With dead ends: 11496 [2021-07-13 19:58:14,918 INFO L226 Difference]: Without dead ends: 11262 [2021-07-13 19:58:14,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1297.8ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:58:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11262 states. [2021-07-13 19:58:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11262 to 7310. [2021-07-13 19:58:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 7309 states have (on average 4.5419346011766315) internal successors, (33197), 7309 states have internal predecessors, (33197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 33197 transitions. [2021-07-13 19:58:15,106 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 33197 transitions. Word has length 30 [2021-07-13 19:58:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:15,106 INFO L482 AbstractCegarLoop]: Abstraction has 7310 states and 33197 transitions. [2021-07-13 19:58:15,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 33197 transitions. [2021-07-13 19:58:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:15,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:15,120 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:15,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-13 19:58:15,325 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash -634323574, now seen corresponding path program 37 times [2021-07-13 19:58:15,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:15,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973820513] [2021-07-13 19:58:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:15,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973820513] [2021-07-13 19:58:15,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973820513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438714148] [2021-07-13 19:58:15,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:15,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:15,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:15,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:15,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:15,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:58:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438714148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 19:58:15,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974568676] [2021-07-13 19:58:15,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:15,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:15,658 INFO L87 Difference]: Start difference. First operand 7310 states and 33197 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:18,180 INFO L93 Difference]: Finished difference Result 12590 states and 53636 transitions. [2021-07-13 19:58:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 19:58:18,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:18,214 INFO L225 Difference]: With dead ends: 12590 [2021-07-13 19:58:18,215 INFO L226 Difference]: Without dead ends: 12386 [2021-07-13 19:58:18,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1448.0ms TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:58:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12386 states. [2021-07-13 19:58:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12386 to 7529. [2021-07-13 19:58:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7528 states have (on average 4.532412327311371) internal successors, (34120), 7528 states have internal predecessors, (34120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 34120 transitions. [2021-07-13 19:58:18,421 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 34120 transitions. Word has length 30 [2021-07-13 19:58:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:18,421 INFO L482 AbstractCegarLoop]: Abstraction has 7529 states and 34120 transitions. [2021-07-13 19:58:18,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 34120 transitions. [2021-07-13 19:58:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:18,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:18,436 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:18,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 19:58:18,637 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1794458804, now seen corresponding path program 41 times [2021-07-13 19:58:18,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:18,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794101519] [2021-07-13 19:58:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:18,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794101519] [2021-07-13 19:58:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794101519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:18,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422082149] [2021-07-13 19:58:18,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:18,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:18,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:18,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:58:18,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:18,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:18,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:18,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:58:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422082149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:58:19,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581248848] [2021-07-13 19:58:19,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:19,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:19,018 INFO L87 Difference]: Start difference. First operand 7529 states and 34120 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:21,190 INFO L93 Difference]: Finished difference Result 11839 states and 50966 transitions. [2021-07-13 19:58:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 19:58:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:21,225 INFO L225 Difference]: With dead ends: 11839 [2021-07-13 19:58:21,225 INFO L226 Difference]: Without dead ends: 11516 [2021-07-13 19:58:21,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 1656.0ms TimeCoverageRelationStatistics Valid=831, Invalid=4281, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:58:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11516 states. [2021-07-13 19:58:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11516 to 7650. [2021-07-13 19:58:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7650 states, 7649 states have (on average 4.527781409334554) internal successors, (34633), 7649 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7650 states to 7650 states and 34633 transitions. [2021-07-13 19:58:21,429 INFO L78 Accepts]: Start accepts. Automaton has 7650 states and 34633 transitions. Word has length 30 [2021-07-13 19:58:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:21,429 INFO L482 AbstractCegarLoop]: Abstraction has 7650 states and 34633 transitions. [2021-07-13 19:58:21,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7650 states and 34633 transitions. [2021-07-13 19:58:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:21,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:21,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:21,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:21,643 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:21,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2107985200, now seen corresponding path program 42 times [2021-07-13 19:58:21,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:21,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686189499] [2021-07-13 19:58:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:21,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:21,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686189499] [2021-07-13 19:58:21,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686189499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:21,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795493006] [2021-07-13 19:58:21,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:21,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:58:21,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:58:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:21,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 19:58:21,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:21,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:21,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:21,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:47 [2021-07-13 19:58:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:22,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795493006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:22,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:22,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:58:22,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456884021] [2021-07-13 19:58:22,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:58:22,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:58:22,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:58:22,081 INFO L87 Difference]: Start difference. First operand 7650 states and 34633 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:25,480 INFO L93 Difference]: Finished difference Result 10919 states and 47521 transitions. [2021-07-13 19:58:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:58:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:25,508 INFO L225 Difference]: With dead ends: 10919 [2021-07-13 19:58:25,508 INFO L226 Difference]: Without dead ends: 10608 [2021-07-13 19:58:25,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 2570.6ms TimeCoverageRelationStatistics Valid=1141, Invalid=5339, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:58:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10608 states. [2021-07-13 19:58:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10608 to 7660. [2021-07-13 19:58:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7660 states, 7659 states have (on average 4.527353440396919) internal successors, (34675), 7659 states have internal predecessors, (34675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7660 states to 7660 states and 34675 transitions. [2021-07-13 19:58:25,670 INFO L78 Accepts]: Start accepts. Automaton has 7660 states and 34675 transitions. Word has length 30 [2021-07-13 19:58:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:25,670 INFO L482 AbstractCegarLoop]: Abstraction has 7660 states and 34675 transitions. [2021-07-13 19:58:25,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7660 states and 34675 transitions. [2021-07-13 19:58:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:25,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:25,684 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:25,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:25,884 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash 72204810, now seen corresponding path program 38 times [2021-07-13 19:58:25,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:25,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322139992] [2021-07-13 19:58:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322139992] [2021-07-13 19:58:26,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322139992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526626221] [2021-07-13 19:58:26,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:26,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:26,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:26,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:58:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:26,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:26,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:58:26,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:26,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:58:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526626221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:26,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 19:58:26,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879138073] [2021-07-13 19:58:26,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:26,287 INFO L87 Difference]: Start difference. First operand 7660 states and 34675 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:28,682 INFO L93 Difference]: Finished difference Result 11728 states and 50591 transitions. [2021-07-13 19:58:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 19:58:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:28,713 INFO L225 Difference]: With dead ends: 11728 [2021-07-13 19:58:28,713 INFO L226 Difference]: Without dead ends: 11614 [2021-07-13 19:58:28,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 19:58:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11614 states. [2021-07-13 19:58:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11614 to 7773. [2021-07-13 19:58:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 4.523417395779722) internal successors, (35156), 7772 states have internal predecessors, (35156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 35156 transitions. [2021-07-13 19:58:28,929 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 35156 transitions. Word has length 30 [2021-07-13 19:58:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:28,929 INFO L482 AbstractCegarLoop]: Abstraction has 7773 states and 35156 transitions. [2021-07-13 19:58:28,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 35156 transitions. [2021-07-13 19:58:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:28,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:28,944 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:29,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-07-13 19:58:29,149 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2040832340, now seen corresponding path program 39 times [2021-07-13 19:58:29,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:29,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037518950] [2021-07-13 19:58:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:29,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037518950] [2021-07-13 19:58:29,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037518950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777222868] [2021-07-13 19:58:29,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:29,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:58:29,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:58:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:29,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:29,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:58:29,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:29,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:58:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777222868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:29,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:58:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343408712] [2021-07-13 19:58:29,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:29,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:29,526 INFO L87 Difference]: Start difference. First operand 7773 states and 35156 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:33,119 INFO L93 Difference]: Finished difference Result 12371 states and 52833 transitions. [2021-07-13 19:58:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 19:58:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:33,154 INFO L225 Difference]: With dead ends: 12371 [2021-07-13 19:58:33,154 INFO L226 Difference]: Without dead ends: 12142 [2021-07-13 19:58:33,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 2288.7ms TimeCoverageRelationStatistics Valid=857, Invalid=6625, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 19:58:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-07-13 19:58:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 7834. [2021-07-13 19:58:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7834 states, 7833 states have (on average 4.51946891357079) internal successors, (35401), 7833 states have internal predecessors, (35401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7834 states to 7834 states and 35401 transitions. [2021-07-13 19:58:33,367 INFO L78 Accepts]: Start accepts. Automaton has 7834 states and 35401 transitions. Word has length 30 [2021-07-13 19:58:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:33,367 INFO L482 AbstractCegarLoop]: Abstraction has 7834 states and 35401 transitions. [2021-07-13 19:58:33,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7834 states and 35401 transitions. [2021-07-13 19:58:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:33,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:33,382 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:33,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:33,583 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:33,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1352757754, now seen corresponding path program 63 times [2021-07-13 19:58:33,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:33,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674690971] [2021-07-13 19:58:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:33,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674690971] [2021-07-13 19:58:33,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674690971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923982493] [2021-07-13 19:58:33,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:33,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:58:33,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:33,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:33,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:33,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:33,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:58:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923982493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:33,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:33,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328719550] [2021-07-13 19:58:33,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:33,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:33,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:33,965 INFO L87 Difference]: Start difference. First operand 7834 states and 35401 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:35,568 INFO L93 Difference]: Finished difference Result 9870 states and 43449 transitions. [2021-07-13 19:58:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:58:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:35,594 INFO L225 Difference]: With dead ends: 9870 [2021-07-13 19:58:35,594 INFO L226 Difference]: Without dead ends: 9588 [2021-07-13 19:58:35,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1095.8ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:58:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9588 states. [2021-07-13 19:58:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9588 to 7876. [2021-07-13 19:58:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 4.519238095238095) internal successors, (35589), 7875 states have internal predecessors, (35589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 35589 transitions. [2021-07-13 19:58:35,758 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 35589 transitions. Word has length 30 [2021-07-13 19:58:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:35,758 INFO L482 AbstractCegarLoop]: Abstraction has 7876 states and 35589 transitions. [2021-07-13 19:58:35,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 35589 transitions. [2021-07-13 19:58:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:35,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:35,773 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:35,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-13 19:58:35,974 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1637470148, now seen corresponding path program 43 times [2021-07-13 19:58:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:35,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724399384] [2021-07-13 19:58:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724399384] [2021-07-13 19:58:36,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724399384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787300795] [2021-07-13 19:58:36,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:36,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:36,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:36,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:36,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:36,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:58:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787300795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:36,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:36,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549326292] [2021-07-13 19:58:36,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:36,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:36,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:36,407 INFO L87 Difference]: Start difference. First operand 7876 states and 35589 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:38,639 INFO L93 Difference]: Finished difference Result 9297 states and 41271 transitions. [2021-07-13 19:58:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:58:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:38,662 INFO L225 Difference]: With dead ends: 9297 [2021-07-13 19:58:38,663 INFO L226 Difference]: Without dead ends: 9128 [2021-07-13 19:58:38,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1806.3ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:58:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-07-13 19:58:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7890. [2021-07-13 19:58:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7890 states, 7889 states have (on average 4.517302573203194) internal successors, (35637), 7889 states have internal predecessors, (35637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 35637 transitions. [2021-07-13 19:58:38,838 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 35637 transitions. Word has length 30 [2021-07-13 19:58:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:38,838 INFO L482 AbstractCegarLoop]: Abstraction has 7890 states and 35637 transitions. [2021-07-13 19:58:38,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 35637 transitions. [2021-07-13 19:58:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:38,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:38,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:39,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,054 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash 771262022, now seen corresponding path program 64 times [2021-07-13 19:58:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:39,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341545083] [2021-07-13 19:58:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:39,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341545083] [2021-07-13 19:58:39,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341545083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688431751] [2021-07-13 19:58:39,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:58:39,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:39,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:39,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:39,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:58:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688431751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:39,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:39,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:58:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595320945] [2021-07-13 19:58:39,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:39,396 INFO L87 Difference]: Start difference. First operand 7890 states and 35637 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:40,959 INFO L93 Difference]: Finished difference Result 9609 states and 42480 transitions. [2021-07-13 19:58:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:58:40,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:40,984 INFO L225 Difference]: With dead ends: 9609 [2021-07-13 19:58:40,984 INFO L226 Difference]: Without dead ends: 9455 [2021-07-13 19:58:40,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1218.5ms TimeCoverageRelationStatistics Valid=454, Invalid=2302, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:58:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-07-13 19:58:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 7920. [2021-07-13 19:58:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7920 states, 7919 states have (on average 4.5173633034474046) internal successors, (35773), 7919 states have internal predecessors, (35773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7920 states to 7920 states and 35773 transitions. [2021-07-13 19:58:41,182 INFO L78 Accepts]: Start accepts. Automaton has 7920 states and 35773 transitions. Word has length 30 [2021-07-13 19:58:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:41,183 INFO L482 AbstractCegarLoop]: Abstraction has 7920 states and 35773 transitions. [2021-07-13 19:58:41,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7920 states and 35773 transitions. [2021-07-13 19:58:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:41,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:41,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:41,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 19:58:41,400 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1970933330, now seen corresponding path program 65 times [2021-07-13 19:58:41,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:41,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952809305] [2021-07-13 19:58:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:41,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:41,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952809305] [2021-07-13 19:58:41,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952809305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:41,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958436417] [2021-07-13 19:58:41,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:41,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:58:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:58:41,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:41,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:41,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:41,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:58:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958436417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:41,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:41,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:58:41,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831947295] [2021-07-13 19:58:41,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:58:41,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:41,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:58:41,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:58:41,743 INFO L87 Difference]: Start difference. First operand 7920 states and 35773 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:43,396 INFO L93 Difference]: Finished difference Result 9850 states and 43308 transitions. [2021-07-13 19:58:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:58:43,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:43,424 INFO L225 Difference]: With dead ends: 9850 [2021-07-13 19:58:43,424 INFO L226 Difference]: Without dead ends: 9556 [2021-07-13 19:58:43,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1296.4ms TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:58:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-07-13 19:58:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 7970. [2021-07-13 19:58:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7970 states, 7969 states have (on average 4.516375956832727) internal successors, (35991), 7969 states have internal predecessors, (35991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7970 states to 7970 states and 35991 transitions. [2021-07-13 19:58:43,618 INFO L78 Accepts]: Start accepts. Automaton has 7970 states and 35991 transitions. Word has length 30 [2021-07-13 19:58:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:43,618 INFO L482 AbstractCegarLoop]: Abstraction has 7970 states and 35991 transitions. [2021-07-13 19:58:43,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7970 states and 35991 transitions. [2021-07-13 19:58:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:43,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:43,637 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:43,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:43,852 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1395227832, now seen corresponding path program 44 times [2021-07-13 19:58:43,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:43,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804353156] [2021-07-13 19:58:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:44,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:44,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804353156] [2021-07-13 19:58:44,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804353156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:44,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432584208] [2021-07-13 19:58:44,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:44,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:44,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:58:44,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:44,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:44,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:58:44,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:44,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:44,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:44,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:58:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432584208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:44,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:44,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:58:44,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069458898] [2021-07-13 19:58:44,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:44,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:44,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:44,302 INFO L87 Difference]: Start difference. First operand 7970 states and 35991 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:46,379 INFO L93 Difference]: Finished difference Result 9263 states and 40965 transitions. [2021-07-13 19:58:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:58:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:46,403 INFO L225 Difference]: With dead ends: 9263 [2021-07-13 19:58:46,403 INFO L226 Difference]: Without dead ends: 9012 [2021-07-13 19:58:46,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1587.7ms TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:58:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2021-07-13 19:58:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 7984. [2021-07-13 19:58:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 4.5145935112113245) internal successors, (36040), 7983 states have internal predecessors, (36040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 36040 transitions. [2021-07-13 19:58:46,564 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 36040 transitions. Word has length 30 [2021-07-13 19:58:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:46,564 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 36040 transitions. [2021-07-13 19:58:46,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 36040 transitions. [2021-07-13 19:58:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:46,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:46,580 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:46,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 19:58:46,781 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1504152388, now seen corresponding path program 45 times [2021-07-13 19:58:46,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:46,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455829294] [2021-07-13 19:58:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:46,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:46,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455829294] [2021-07-13 19:58:46,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455829294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584207713] [2021-07-13 19:58:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:46,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:58:46,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:46,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:58:46,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:47,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:47,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:58:47,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:47,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:47,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:47,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:58:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584207713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:47,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:47,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:58:47,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115550818] [2021-07-13 19:58:47,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:47,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:47,219 INFO L87 Difference]: Start difference. First operand 7984 states and 36040 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:49,227 INFO L93 Difference]: Finished difference Result 9395 states and 41514 transitions. [2021-07-13 19:58:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:58:49,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:49,251 INFO L225 Difference]: With dead ends: 9395 [2021-07-13 19:58:49,252 INFO L226 Difference]: Without dead ends: 9104 [2021-07-13 19:58:49,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1583.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:58:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-07-13 19:58:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 7972. [2021-07-13 19:58:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7972 states, 7971 states have (on average 4.51624639317526) internal successors, (35999), 7971 states have internal predecessors, (35999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 35999 transitions. [2021-07-13 19:58:49,415 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 35999 transitions. Word has length 30 [2021-07-13 19:58:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:49,415 INFO L482 AbstractCegarLoop]: Abstraction has 7972 states and 35999 transitions. [2021-07-13 19:58:49,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 35999 transitions. [2021-07-13 19:58:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:49,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:49,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:49,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:49,631 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1111003758, now seen corresponding path program 66 times [2021-07-13 19:58:49,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:49,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726205698] [2021-07-13 19:58:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:49,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:49,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726205698] [2021-07-13 19:58:49,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726205698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:49,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060109153] [2021-07-13 19:58:49,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:49,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:58:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:58:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:49,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:50,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-07-13 19:58:50,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:50,043 INFO L628 ElimStorePlain]: treesize reduction 16, result has 67.3 percent of original size [2021-07-13 19:58:50,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:50,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2021-07-13 19:58:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:50,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060109153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:50,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:50,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:58:50,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449056215] [2021-07-13 19:58:50,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:58:50,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:58:50,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:50,126 INFO L87 Difference]: Start difference. First operand 7972 states and 35999 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:52,870 INFO L93 Difference]: Finished difference Result 10521 states and 45798 transitions. [2021-07-13 19:58:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 19:58:52,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:52,897 INFO L225 Difference]: With dead ends: 10521 [2021-07-13 19:58:52,897 INFO L226 Difference]: Without dead ends: 10162 [2021-07-13 19:58:52,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1941.3ms TimeCoverageRelationStatistics Valid=655, Invalid=4037, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:58:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-07-13 19:58:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 8010. [2021-07-13 19:58:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8010 states, 8009 states have (on average 4.514795854663504) internal successors, (36159), 8009 states have internal predecessors, (36159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 36159 transitions. [2021-07-13 19:58:53,067 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 36159 transitions. Word has length 30 [2021-07-13 19:58:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:53,067 INFO L482 AbstractCegarLoop]: Abstraction has 8010 states and 36159 transitions. [2021-07-13 19:58:53,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 36159 transitions. [2021-07-13 19:58:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:53,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:53,082 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:53,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-13 19:58:53,283 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 193735636, now seen corresponding path program 46 times [2021-07-13 19:58:53,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:53,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80226703] [2021-07-13 19:58:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:53,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:53,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80226703] [2021-07-13 19:58:53,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80226703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:53,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340614109] [2021-07-13 19:58:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:53,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:53,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:53,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:53,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:53,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 19:58:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:53,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340614109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:53,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:53,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:53,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813948852] [2021-07-13 19:58:53,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:53,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:53,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:53,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:53,727 INFO L87 Difference]: Start difference. First operand 8010 states and 36159 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:56,190 INFO L93 Difference]: Finished difference Result 9642 states and 42627 transitions. [2021-07-13 19:58:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:58:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:56,218 INFO L225 Difference]: With dead ends: 9642 [2021-07-13 19:58:56,218 INFO L226 Difference]: Without dead ends: 9477 [2021-07-13 19:58:56,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1808.6ms TimeCoverageRelationStatistics Valid=506, Invalid=3034, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:58:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-07-13 19:58:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8066. [2021-07-13 19:58:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8066 states, 8065 states have (on average 4.5052696838189705) internal successors, (36335), 8065 states have internal predecessors, (36335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8066 states to 8066 states and 36335 transitions. [2021-07-13 19:58:56,409 INFO L78 Accepts]: Start accepts. Automaton has 8066 states and 36335 transitions. Word has length 30 [2021-07-13 19:58:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:56,409 INFO L482 AbstractCegarLoop]: Abstraction has 8066 states and 36335 transitions. [2021-07-13 19:58:56,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8066 states and 36335 transitions. [2021-07-13 19:58:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:56,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:56,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:56,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:56,629 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -264609798, now seen corresponding path program 47 times [2021-07-13 19:58:56,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:56,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368714504] [2021-07-13 19:58:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:56,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:56,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368714504] [2021-07-13 19:58:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368714504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:56,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980530517] [2021-07-13 19:58:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:56,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:58:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:56,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:58:56,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:56,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:56,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:56,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:58:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:57,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980530517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:57,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:57,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:58:57,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053162252] [2021-07-13 19:58:57,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:58:57,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:57,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:58:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:58:57,003 INFO L87 Difference]: Start difference. First operand 8066 states and 36335 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:59,082 INFO L93 Difference]: Finished difference Result 9503 states and 42116 transitions. [2021-07-13 19:58:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:58:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:58:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:59,106 INFO L225 Difference]: With dead ends: 9503 [2021-07-13 19:58:59,106 INFO L226 Difference]: Without dead ends: 9370 [2021-07-13 19:58:59,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1540.3ms TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:58:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-07-13 19:58:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8076. [2021-07-13 19:58:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8075 states have (on average 4.503405572755418) internal successors, (36365), 8075 states have internal predecessors, (36365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 36365 transitions. [2021-07-13 19:58:59,271 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 36365 transitions. Word has length 30 [2021-07-13 19:58:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:59,272 INFO L482 AbstractCegarLoop]: Abstraction has 8076 states and 36365 transitions. [2021-07-13 19:58:59,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 36365 transitions. [2021-07-13 19:58:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:58:59,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:59,288 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:59,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:59,488 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash -770956064, now seen corresponding path program 48 times [2021-07-13 19:58:59,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:59,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747396509] [2021-07-13 19:58:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:59,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747396509] [2021-07-13 19:58:59,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747396509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:59,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975778730] [2021-07-13 19:58:59,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:59,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:58:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:58:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:59,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-07-13 19:58:59,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:58:59,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:59,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:59,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-07-13 19:58:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:59,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975778730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:59,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:59,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:58:59,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190620032] [2021-07-13 19:58:59,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:58:59,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:58:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:58:59,977 INFO L87 Difference]: Start difference. First operand 8076 states and 36365 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:02,221 INFO L93 Difference]: Finished difference Result 9490 states and 41806 transitions. [2021-07-13 19:59:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:59:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:02,246 INFO L225 Difference]: With dead ends: 9490 [2021-07-13 19:59:02,247 INFO L226 Difference]: Without dead ends: 9266 [2021-07-13 19:59:02,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1525.4ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:59:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2021-07-13 19:59:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 8062. [2021-07-13 19:59:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8062 states, 8061 states have (on average 4.506512839598065) internal successors, (36327), 8061 states have internal predecessors, (36327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8062 states to 8062 states and 36327 transitions. [2021-07-13 19:59:02,409 INFO L78 Accepts]: Start accepts. Automaton has 8062 states and 36327 transitions. Word has length 30 [2021-07-13 19:59:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:02,409 INFO L482 AbstractCegarLoop]: Abstraction has 8062 states and 36327 transitions. [2021-07-13 19:59:02,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8062 states and 36327 transitions. [2021-07-13 19:59:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:02,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:02,425 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:02,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-07-13 19:59:02,625 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash 173899368, now seen corresponding path program 49 times [2021-07-13 19:59:02,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:02,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698872618] [2021-07-13 19:59:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:02,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698872618] [2021-07-13 19:59:02,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698872618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217996253] [2021-07-13 19:59:02,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:02,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:02,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:02,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:02,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:02,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217996253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:02,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991343490] [2021-07-13 19:59:02,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:02,991 INFO L87 Difference]: Start difference. First operand 8062 states and 36327 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:05,031 INFO L93 Difference]: Finished difference Result 9309 states and 41358 transitions. [2021-07-13 19:59:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:59:05,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:05,055 INFO L225 Difference]: With dead ends: 9309 [2021-07-13 19:59:05,056 INFO L226 Difference]: Without dead ends: 9195 [2021-07-13 19:59:05,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1540.6ms TimeCoverageRelationStatistics Valid=464, Invalid=2506, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:59:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2021-07-13 19:59:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 8076. [2021-07-13 19:59:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8075 states have (on average 4.505758513931888) internal successors, (36384), 8075 states have internal predecessors, (36384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 36384 transitions. [2021-07-13 19:59:05,217 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 36384 transitions. Word has length 30 [2021-07-13 19:59:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:05,217 INFO L482 AbstractCegarLoop]: Abstraction has 8076 states and 36384 transitions. [2021-07-13 19:59:05,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 36384 transitions. [2021-07-13 19:59:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:05,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:05,233 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:05,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-13 19:59:05,449 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1221687708, now seen corresponding path program 50 times [2021-07-13 19:59:05,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:05,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665785924] [2021-07-13 19:59:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:05,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665785924] [2021-07-13 19:59:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665785924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379251029] [2021-07-13 19:59:05,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:05,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:05,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:05,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:59:05,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:05,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:05,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:05,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:59:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:05,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379251029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:05,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:05,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:59:05,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107940459] [2021-07-13 19:59:05,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:05,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:05,891 INFO L87 Difference]: Start difference. First operand 8076 states and 36384 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:08,181 INFO L93 Difference]: Finished difference Result 9480 states and 41834 transitions. [2021-07-13 19:59:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:59:08,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:08,205 INFO L225 Difference]: With dead ends: 9480 [2021-07-13 19:59:08,205 INFO L226 Difference]: Without dead ends: 9184 [2021-07-13 19:59:08,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1694.9ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 19:59:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9184 states. [2021-07-13 19:59:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9184 to 8079. [2021-07-13 19:59:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 4.504951720722951) internal successors, (36391), 8078 states have internal predecessors, (36391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 36391 transitions. [2021-07-13 19:59:08,364 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 36391 transitions. Word has length 30 [2021-07-13 19:59:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:08,365 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 36391 transitions. [2021-07-13 19:59:08,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 36391 transitions. [2021-07-13 19:59:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:08,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:08,380 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:08,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 19:59:08,581 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1585391294, now seen corresponding path program 51 times [2021-07-13 19:59:08,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:08,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887926349] [2021-07-13 19:59:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:08,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887926349] [2021-07-13 19:59:08,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887926349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477281853] [2021-07-13 19:59:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:08,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:59:08,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:08,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:08,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:59:08,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:08,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:08,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:08,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:59:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:09,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477281853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:09,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:09,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:59:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939548452] [2021-07-13 19:59:09,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:09,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:09,063 INFO L87 Difference]: Start difference. First operand 8079 states and 36391 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:11,370 INFO L93 Difference]: Finished difference Result 9396 states and 41461 transitions. [2021-07-13 19:59:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:59:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:11,394 INFO L225 Difference]: With dead ends: 9396 [2021-07-13 19:59:11,394 INFO L226 Difference]: Without dead ends: 9148 [2021-07-13 19:59:11,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1648.5ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:59:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9148 states. [2021-07-13 19:59:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9148 to 8090. [2021-07-13 19:59:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 8089 states have (on average 4.503523303251329) internal successors, (36429), 8089 states have internal predecessors, (36429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 36429 transitions. [2021-07-13 19:59:11,577 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 36429 transitions. Word has length 30 [2021-07-13 19:59:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:11,577 INFO L482 AbstractCegarLoop]: Abstraction has 8090 states and 36429 transitions. [2021-07-13 19:59:11,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 36429 transitions. [2021-07-13 19:59:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:11,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:11,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:11,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-07-13 19:59:11,810 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2118148276, now seen corresponding path program 52 times [2021-07-13 19:59:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:11,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852437963] [2021-07-13 19:59:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:11,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:11,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852437963] [2021-07-13 19:59:11,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852437963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:11,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223565457] [2021-07-13 19:59:11,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:11,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:11,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:12,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:12,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:12,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:12,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:12,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223565457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:12,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:12,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:12,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729611523] [2021-07-13 19:59:12,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:12,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:12,171 INFO L87 Difference]: Start difference. First operand 8090 states and 36429 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:13,995 INFO L93 Difference]: Finished difference Result 9335 states and 41409 transitions. [2021-07-13 19:59:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:59:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:14,064 INFO L225 Difference]: With dead ends: 9335 [2021-07-13 19:59:14,065 INFO L226 Difference]: Without dead ends: 9224 [2021-07-13 19:59:14,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1342.7ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:59:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2021-07-13 19:59:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 8112. [2021-07-13 19:59:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 8111 states have (on average 4.501294538281346) internal successors, (36510), 8111 states have internal predecessors, (36510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 36510 transitions. [2021-07-13 19:59:14,214 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 36510 transitions. Word has length 30 [2021-07-13 19:59:14,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:14,214 INFO L482 AbstractCegarLoop]: Abstraction has 8112 states and 36510 transitions. [2021-07-13 19:59:14,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 36510 transitions. [2021-07-13 19:59:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:14,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:14,230 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:14,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:14,431 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash 331084236, now seen corresponding path program 53 times [2021-07-13 19:59:14,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:14,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998695218] [2021-07-13 19:59:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:14,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:14,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998695218] [2021-07-13 19:59:14,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998695218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:14,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886493002] [2021-07-13 19:59:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:14,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:59:14,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:59:14,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:14,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:14,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 19:59:14,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:14,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:14,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:14,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:236 [2021-07-13 19:59:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:14,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886493002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:14,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:14,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:59:14,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718390059] [2021-07-13 19:59:14,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:14,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:14,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:14,950 INFO L87 Difference]: Start difference. First operand 8112 states and 36510 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:16,648 INFO L93 Difference]: Finished difference Result 9371 states and 41381 transitions. [2021-07-13 19:59:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:16,649 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:16,672 INFO L225 Difference]: With dead ends: 9371 [2021-07-13 19:59:16,673 INFO L226 Difference]: Without dead ends: 9130 [2021-07-13 19:59:16,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1324.8ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9130 states. [2021-07-13 19:59:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9130 to 8112. [2021-07-13 19:59:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 8111 states have (on average 4.501294538281346) internal successors, (36510), 8111 states have internal predecessors, (36510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 36510 transitions. [2021-07-13 19:59:16,835 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 36510 transitions. Word has length 30 [2021-07-13 19:59:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:16,835 INFO L482 AbstractCegarLoop]: Abstraction has 8112 states and 36510 transitions. [2021-07-13 19:59:16,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 36510 transitions. [2021-07-13 19:59:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:16,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:16,851 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:17,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-07-13 19:59:17,051 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2075448242, now seen corresponding path program 54 times [2021-07-13 19:59:17,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358486949] [2021-07-13 19:59:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:17,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358486949] [2021-07-13 19:59:17,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358486949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845008706] [2021-07-13 19:59:17,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:17,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:59:17,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:59:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:17,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:17,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 19:59:17,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:17,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:17,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:17,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-13 19:59:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845008706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:17,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 19:59:17,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592186633] [2021-07-13 19:59:17,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:17,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:17,545 INFO L87 Difference]: Start difference. First operand 8112 states and 36510 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:19,805 INFO L93 Difference]: Finished difference Result 9602 states and 42307 transitions. [2021-07-13 19:59:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:59:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:19,830 INFO L225 Difference]: With dead ends: 9602 [2021-07-13 19:59:19,830 INFO L226 Difference]: Without dead ends: 9392 [2021-07-13 19:59:19,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1717.9ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:59:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-07-13 19:59:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8109. [2021-07-13 19:59:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8109 states, 8108 states have (on average 4.5022200296003945) internal successors, (36504), 8108 states have internal predecessors, (36504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8109 states to 8109 states and 36504 transitions. [2021-07-13 19:59:19,994 INFO L78 Accepts]: Start accepts. Automaton has 8109 states and 36504 transitions. Word has length 30 [2021-07-13 19:59:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:19,994 INFO L482 AbstractCegarLoop]: Abstraction has 8109 states and 36504 transitions. [2021-07-13 19:59:19,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8109 states and 36504 transitions. [2021-07-13 19:59:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:20,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:20,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:20,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:20,211 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2073891774, now seen corresponding path program 13 times [2021-07-13 19:59:20,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:20,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387636976] [2021-07-13 19:59:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:20,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387636976] [2021-07-13 19:59:20,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387636976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228871113] [2021-07-13 19:59:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:20,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:20,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:20,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:20,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:20,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:59:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228871113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:20,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:20,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323540678] [2021-07-13 19:59:20,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:20,568 INFO L87 Difference]: Start difference. First operand 8109 states and 36504 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:22,290 INFO L93 Difference]: Finished difference Result 9471 states and 41952 transitions. [2021-07-13 19:59:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:22,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:22,314 INFO L225 Difference]: With dead ends: 9471 [2021-07-13 19:59:22,315 INFO L226 Difference]: Without dead ends: 9353 [2021-07-13 19:59:22,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1291.0ms TimeCoverageRelationStatistics Valid=488, Invalid=2482, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:59:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2021-07-13 19:59:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 8145. [2021-07-13 19:59:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8145 states, 8144 states have (on average 4.5012278978389) internal successors, (36658), 8144 states have internal predecessors, (36658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8145 states to 8145 states and 36658 transitions. [2021-07-13 19:59:22,486 INFO L78 Accepts]: Start accepts. Automaton has 8145 states and 36658 transitions. Word has length 30 [2021-07-13 19:59:22,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:22,486 INFO L482 AbstractCegarLoop]: Abstraction has 8145 states and 36658 transitions. [2021-07-13 19:59:22,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8145 states and 36658 transitions. [2021-07-13 19:59:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:22,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:22,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:22,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-13 19:59:22,703 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash 997631874, now seen corresponding path program 14 times [2021-07-13 19:59:22,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:22,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987524369] [2021-07-13 19:59:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987524369] [2021-07-13 19:59:22,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987524369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688319465] [2021-07-13 19:59:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:22,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:22,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:22,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:23,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:23,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:59:23,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:23,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:23,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:23,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 19:59:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:23,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688319465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:23,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:23,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:59:23,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356100799] [2021-07-13 19:59:23,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:23,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:23,109 INFO L87 Difference]: Start difference. First operand 8145 states and 36658 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:26,007 INFO L93 Difference]: Finished difference Result 9577 states and 42300 transitions. [2021-07-13 19:59:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 19:59:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:26,030 INFO L225 Difference]: With dead ends: 9577 [2021-07-13 19:59:26,030 INFO L226 Difference]: Without dead ends: 9367 [2021-07-13 19:59:26,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2223.9ms TimeCoverageRelationStatistics Valid=701, Invalid=4999, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 19:59:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9367 states. [2021-07-13 19:59:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9367 to 8133. [2021-07-13 19:59:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.50122970978849) internal successors, (36604), 8132 states have internal predecessors, (36604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36604 transitions. [2021-07-13 19:59:26,191 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36604 transitions. Word has length 30 [2021-07-13 19:59:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:26,191 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36604 transitions. [2021-07-13 19:59:26,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36604 transitions. [2021-07-13 19:59:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:26,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:26,255 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:26,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-13 19:59:26,456 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1066082048, now seen corresponding path program 40 times [2021-07-13 19:59:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:26,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171065422] [2021-07-13 19:59:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:26,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171065422] [2021-07-13 19:59:26,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171065422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878030068] [2021-07-13 19:59:26,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:26,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:26,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:26,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:26,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:26,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:26,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:59:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878030068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:26,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:26,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918713192] [2021-07-13 19:59:26,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:26,792 INFO L87 Difference]: Start difference. First operand 8133 states and 36604 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:28,944 INFO L93 Difference]: Finished difference Result 9201 states and 40906 transitions. [2021-07-13 19:59:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:28,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:29,002 INFO L225 Difference]: With dead ends: 9201 [2021-07-13 19:59:29,002 INFO L226 Difference]: Without dead ends: 9103 [2021-07-13 19:59:29,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1626.5ms TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:59:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9103 states. [2021-07-13 19:59:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9103 to 8139. [2021-07-13 19:59:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8139 states, 8138 states have (on average 4.5011059228311625) internal successors, (36630), 8138 states have internal predecessors, (36630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8139 states to 8139 states and 36630 transitions. [2021-07-13 19:59:29,142 INFO L78 Accepts]: Start accepts. Automaton has 8139 states and 36630 transitions. Word has length 30 [2021-07-13 19:59:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 8139 states and 36630 transitions. [2021-07-13 19:59:29,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8139 states and 36630 transitions. [2021-07-13 19:59:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:29,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:29,157 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:29,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-13 19:59:29,357 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash 459989030, now seen corresponding path program 41 times [2021-07-13 19:59:29,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:29,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462954891] [2021-07-13 19:59:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:29,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:29,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462954891] [2021-07-13 19:59:29,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462954891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:29,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787390379] [2021-07-13 19:59:29,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:29,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:29,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:29,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:29,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:29,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 19:59:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787390379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:29,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:29,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 19:59:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022527442] [2021-07-13 19:59:29,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:59:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:59:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:59:29,673 INFO L87 Difference]: Start difference. First operand 8139 states and 36630 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:31,440 INFO L93 Difference]: Finished difference Result 9099 states and 40534 transitions. [2021-07-13 19:59:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:59:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:31,462 INFO L225 Difference]: With dead ends: 9099 [2021-07-13 19:59:31,462 INFO L226 Difference]: Without dead ends: 8996 [2021-07-13 19:59:31,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1286.3ms TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:59:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-07-13 19:59:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 8133. [2021-07-13 19:59:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.500983767830792) internal successors, (36602), 8132 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36602 transitions. [2021-07-13 19:59:31,611 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36602 transitions. Word has length 30 [2021-07-13 19:59:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:31,611 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36602 transitions. [2021-07-13 19:59:31,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36602 transitions. [2021-07-13 19:59:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:31,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:31,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:31,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-13 19:59:31,827 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1956192188, now seen corresponding path program 42 times [2021-07-13 19:59:31,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:31,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783120791] [2021-07-13 19:59:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:31,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783120791] [2021-07-13 19:59:31,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783120791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794016174] [2021-07-13 19:59:31,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:31,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:59:31,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:31,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:32,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:32,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:32,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:32,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:32,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:32,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:32,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-13 19:59:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794016174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:32,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:32,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:59:32,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243248436] [2021-07-13 19:59:32,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:32,202 INFO L87 Difference]: Start difference. First operand 8133 states and 36602 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:34,193 INFO L93 Difference]: Finished difference Result 9378 states and 41591 transitions. [2021-07-13 19:59:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:59:34,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:34,216 INFO L225 Difference]: With dead ends: 9378 [2021-07-13 19:59:34,216 INFO L226 Difference]: Without dead ends: 9271 [2021-07-13 19:59:34,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1417.4ms TimeCoverageRelationStatistics Valid=494, Invalid=2476, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:59:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9271 states. [2021-07-13 19:59:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9271 to 8133. [2021-07-13 19:59:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.500983767830792) internal successors, (36602), 8132 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36602 transitions. [2021-07-13 19:59:34,377 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36602 transitions. Word has length 30 [2021-07-13 19:59:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:34,377 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36602 transitions. [2021-07-13 19:59:34,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36602 transitions. [2021-07-13 19:59:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:34,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:34,392 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:34,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-13 19:59:34,592 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1090536736, now seen corresponding path program 15 times [2021-07-13 19:59:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:34,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214929601] [2021-07-13 19:59:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:34,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:34,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214929601] [2021-07-13 19:59:34,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214929601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:34,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293306202] [2021-07-13 19:59:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:34,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:59:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:34,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:34,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:34,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:34,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:34,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:34,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-07-13 19:59:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:35,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293306202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:35,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:35,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 19:59:35,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804030086] [2021-07-13 19:59:35,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:35,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:35,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:35,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:35,021 INFO L87 Difference]: Start difference. First operand 8133 states and 36602 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:37,007 INFO L93 Difference]: Finished difference Result 9601 states and 42387 transitions. [2021-07-13 19:59:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:59:37,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:37,032 INFO L225 Difference]: With dead ends: 9601 [2021-07-13 19:59:37,032 INFO L226 Difference]: Without dead ends: 9369 [2021-07-13 19:59:37,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1570.0ms TimeCoverageRelationStatistics Valid=589, Invalid=3071, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 19:59:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-07-13 19:59:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 8123. [2021-07-13 19:59:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8123 states, 8122 states have (on average 4.501354346220142) internal successors, (36560), 8122 states have internal predecessors, (36560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8123 states to 8123 states and 36560 transitions. [2021-07-13 19:59:37,196 INFO L78 Accepts]: Start accepts. Automaton has 8123 states and 36560 transitions. Word has length 30 [2021-07-13 19:59:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:37,196 INFO L482 AbstractCegarLoop]: Abstraction has 8123 states and 36560 transitions. [2021-07-13 19:59:37,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8123 states and 36560 transitions. [2021-07-13 19:59:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:37,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:37,212 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:37,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-07-13 19:59:37,425 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1108317834, now seen corresponding path program 43 times [2021-07-13 19:59:37,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:37,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247847756] [2021-07-13 19:59:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247847756] [2021-07-13 19:59:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247847756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107646134] [2021-07-13 19:59:37,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:37,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:37,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:37,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:37,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:37,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:37,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107646134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:37,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:37,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:37,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063246865] [2021-07-13 19:59:37,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:37,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:37,775 INFO L87 Difference]: Start difference. First operand 8123 states and 36560 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:39,104 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-07-13 19:59:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:39,446 INFO L93 Difference]: Finished difference Result 9137 states and 40658 transitions. [2021-07-13 19:59:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:59:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:39,470 INFO L225 Difference]: With dead ends: 9137 [2021-07-13 19:59:39,470 INFO L226 Difference]: Without dead ends: 9039 [2021-07-13 19:59:39,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1294.6ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:59:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-13 19:59:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 8135. [2021-07-13 19:59:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.5011064666830585) internal successors, (36612), 8134 states have internal predecessors, (36612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36612 transitions. [2021-07-13 19:59:39,630 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36612 transitions. Word has length 30 [2021-07-13 19:59:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:39,630 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36612 transitions. [2021-07-13 19:59:39,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36612 transitions. [2021-07-13 19:59:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:39,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:39,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:39,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:39,861 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1660578384, now seen corresponding path program 44 times [2021-07-13 19:59:39,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:39,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917197339] [2021-07-13 19:59:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:39,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917197339] [2021-07-13 19:59:39,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917197339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:39,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052884037] [2021-07-13 19:59:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:40,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:40,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:40,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:40,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:40,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:40,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:40,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:40,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:40,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:40,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052884037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:40,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:40,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 19:59:40,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393756927] [2021-07-13 19:59:40,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:59:40,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:59:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:59:40,215 INFO L87 Difference]: Start difference. First operand 8135 states and 36612 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:41,541 INFO L93 Difference]: Finished difference Result 9080 states and 40453 transitions. [2021-07-13 19:59:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:41,651 INFO L225 Difference]: With dead ends: 9080 [2021-07-13 19:59:41,651 INFO L226 Difference]: Without dead ends: 8977 [2021-07-13 19:59:41,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1002.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:59:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8977 states. [2021-07-13 19:59:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8977 to 8129. [2021-07-13 19:59:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8129 states, 8128 states have (on average 4.500984251968504) internal successors, (36584), 8128 states have internal predecessors, (36584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8129 states to 8129 states and 36584 transitions. [2021-07-13 19:59:41,793 INFO L78 Accepts]: Start accepts. Automaton has 8129 states and 36584 transitions. Word has length 30 [2021-07-13 19:59:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:41,793 INFO L482 AbstractCegarLoop]: Abstraction has 8129 states and 36584 transitions. [2021-07-13 19:59:41,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8129 states and 36584 transitions. [2021-07-13 19:59:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:41,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:41,809 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:42,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:42,025 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1442285456, now seen corresponding path program 45 times [2021-07-13 19:59:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:42,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917941641] [2021-07-13 19:59:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:42,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917941641] [2021-07-13 19:59:42,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917941641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134816061] [2021-07-13 19:59:42,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:42,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:59:42,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:42,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:42,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:42,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:42,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:42,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134816061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:42,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:42,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060498120] [2021-07-13 19:59:42,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:42,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:42,383 INFO L87 Difference]: Start difference. First operand 8129 states and 36584 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:43,903 INFO L93 Difference]: Finished difference Result 9161 states and 40744 transitions. [2021-07-13 19:59:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:59:43,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:43,926 INFO L225 Difference]: With dead ends: 9161 [2021-07-13 19:59:43,926 INFO L226 Difference]: Without dead ends: 9063 [2021-07-13 19:59:43,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1157.9ms TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2021-07-13 19:59:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 8135. [2021-07-13 19:59:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.500860585197935) internal successors, (36610), 8134 states have internal predecessors, (36610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36610 transitions. [2021-07-13 19:59:44,114 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36610 transitions. Word has length 30 [2021-07-13 19:59:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:44,114 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36610 transitions. [2021-07-13 19:59:44,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36610 transitions. [2021-07-13 19:59:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:44,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:44,130 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:44,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-07-13 19:59:44,330 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -821801390, now seen corresponding path program 46 times [2021-07-13 19:59:44,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:44,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487221312] [2021-07-13 19:59:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:44,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:44,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487221312] [2021-07-13 19:59:44,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487221312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:44,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487551144] [2021-07-13 19:59:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:44,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:44,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:44,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:44,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:44,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:44,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:44,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487551144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:44,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:44,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 19:59:44,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560713482] [2021-07-13 19:59:44,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:44,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:44,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:44,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:44,654 INFO L87 Difference]: Start difference. First operand 8135 states and 36610 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:45,847 INFO L93 Difference]: Finished difference Result 9131 states and 40637 transitions. [2021-07-13 19:59:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:59:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:45,870 INFO L225 Difference]: With dead ends: 9131 [2021-07-13 19:59:45,871 INFO L226 Difference]: Without dead ends: 9039 [2021-07-13 19:59:45,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 940.0ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-13 19:59:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 8135. [2021-07-13 19:59:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.499877059257438) internal successors, (36602), 8134 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36602 transitions. [2021-07-13 19:59:46,027 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36602 transitions. Word has length 30 [2021-07-13 19:59:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:46,027 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36602 transitions. [2021-07-13 19:59:46,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36602 transitions. [2021-07-13 19:59:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:46,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:46,042 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:46,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:46,242 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:46,243 INFO L82 PathProgramCache]: Analyzing trace with hash -50538734, now seen corresponding path program 47 times [2021-07-13 19:59:46,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:46,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331734727] [2021-07-13 19:59:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:46,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331734727] [2021-07-13 19:59:46,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331734727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460948763] [2021-07-13 19:59:46,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:46,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:46,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:46,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 19:59:46,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:46,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:46,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:46,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 19:59:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460948763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:46,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:59:46,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175155610] [2021-07-13 19:59:46,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:46,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:46,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:46,648 INFO L87 Difference]: Start difference. First operand 8135 states and 36602 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:48,204 INFO L93 Difference]: Finished difference Result 9288 states and 41265 transitions. [2021-07-13 19:59:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:59:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:48,228 INFO L225 Difference]: With dead ends: 9288 [2021-07-13 19:59:48,228 INFO L226 Difference]: Without dead ends: 9179 [2021-07-13 19:59:48,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1174.9ms TimeCoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:59:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2021-07-13 19:59:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 8135. [2021-07-13 19:59:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 8134 states have (on average 4.499877059257438) internal successors, (36602), 8134 states have internal predecessors, (36602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 36602 transitions. [2021-07-13 19:59:48,395 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 36602 transitions. Word has length 30 [2021-07-13 19:59:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:48,395 INFO L482 AbstractCegarLoop]: Abstraction has 8135 states and 36602 transitions. [2021-07-13 19:59:48,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 36602 transitions. [2021-07-13 19:59:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:48,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:48,411 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:48,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-07-13 19:59:48,612 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash -687005588, now seen corresponding path program 48 times [2021-07-13 19:59:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:48,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45887448] [2021-07-13 19:59:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:48,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:48,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45887448] [2021-07-13 19:59:48,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45887448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:48,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179638907] [2021-07-13 19:59:48,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:48,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:59:48,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:59:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:48,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:48,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 19:59:48,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:48,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:48,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:48,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 19:59:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179638907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:49,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:49,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 19:59:49,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859509806] [2021-07-13 19:59:49,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:49,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:49,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:49,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:49,054 INFO L87 Difference]: Start difference. First operand 8135 states and 36602 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:51,104 INFO L93 Difference]: Finished difference Result 9477 states and 41760 transitions. [2021-07-13 19:59:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:59:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:51,129 INFO L225 Difference]: With dead ends: 9477 [2021-07-13 19:59:51,129 INFO L226 Difference]: Without dead ends: 9198 [2021-07-13 19:59:51,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1611.5ms TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:59:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9198 states. [2021-07-13 19:59:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9198 to 8133. [2021-07-13 19:59:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8133 states, 8132 states have (on average 4.499877029021151) internal successors, (36593), 8132 states have internal predecessors, (36593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8133 states to 8133 states and 36593 transitions. [2021-07-13 19:59:51,321 INFO L78 Accepts]: Start accepts. Automaton has 8133 states and 36593 transitions. Word has length 30 [2021-07-13 19:59:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:51,321 INFO L482 AbstractCegarLoop]: Abstraction has 8133 states and 36593 transitions. [2021-07-13 19:59:51,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8133 states and 36593 transitions. [2021-07-13 19:59:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:51,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:51,337 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:51,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-13 19:59:51,537 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash -247106348, now seen corresponding path program 49 times [2021-07-13 19:59:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:51,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688789496] [2021-07-13 19:59:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:51,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688789496] [2021-07-13 19:59:51,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688789496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:51,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583937400] [2021-07-13 19:59:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:51,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:51,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:51,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:51,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:51,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:59:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:51,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583937400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:51,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:51,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:59:51,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185560766] [2021-07-13 19:59:51,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:51,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:51,877 INFO L87 Difference]: Start difference. First operand 8133 states and 36593 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:54,064 INFO L93 Difference]: Finished difference Result 9584 states and 42417 transitions. [2021-07-13 19:59:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:54,089 INFO L225 Difference]: With dead ends: 9584 [2021-07-13 19:59:54,089 INFO L226 Difference]: Without dead ends: 9475 [2021-07-13 19:59:54,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1522.5ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:59:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9475 states. [2021-07-13 19:59:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9475 to 8149. [2021-07-13 19:59:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 4.498404516445754) internal successors, (36653), 8148 states have internal predecessors, (36653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 36653 transitions. [2021-07-13 19:59:54,251 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 36653 transitions. Word has length 30 [2021-07-13 19:59:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:54,251 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 36653 transitions. [2021-07-13 19:59:54,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 36653 transitions. [2021-07-13 19:59:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:54,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:54,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:54,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-07-13 19:59:54,479 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 618549104, now seen corresponding path program 16 times [2021-07-13 19:59:54,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:54,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645124200] [2021-07-13 19:59:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:54,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645124200] [2021-07-13 19:59:54,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645124200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:54,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029493095] [2021-07-13 19:59:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:54,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:54,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:54,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:54,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:54,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:54,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:54,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 19:59:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:54,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029493095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:54,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:54,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 19:59:54,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921881655] [2021-07-13 19:59:54,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:59:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:59:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:59:54,836 INFO L87 Difference]: Start difference. First operand 8149 states and 36653 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:56,923 INFO L93 Difference]: Finished difference Result 9749 states and 43033 transitions. [2021-07-13 19:59:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:59:56,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:56,948 INFO L225 Difference]: With dead ends: 9749 [2021-07-13 19:59:56,948 INFO L226 Difference]: Without dead ends: 9556 [2021-07-13 19:59:56,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1477.7ms TimeCoverageRelationStatistics Valid=523, Invalid=2899, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:59:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-07-13 19:59:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8149. [2021-07-13 19:59:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 4.496686303387334) internal successors, (36639), 8148 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 36639 transitions. [2021-07-13 19:59:57,112 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 36639 transitions. Word has length 30 [2021-07-13 19:59:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:57,112 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 36639 transitions. [2021-07-13 19:59:57,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 36639 transitions. [2021-07-13 19:59:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:57,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:57,128 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:57,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:57,328 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash -515852776, now seen corresponding path program 50 times [2021-07-13 19:59:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:57,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477249742] [2021-07-13 19:59:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:57,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477249742] [2021-07-13 19:59:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477249742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920947210] [2021-07-13 19:59:57,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:57,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:57,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:59:57,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:57,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 19:59:57,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:57,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:57,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:57,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 19:59:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:57,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920947210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:57,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:57,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 19:59:57,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51390171] [2021-07-13 19:59:57,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:57,667 INFO L87 Difference]: Start difference. First operand 8149 states and 36639 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:59,565 INFO L93 Difference]: Finished difference Result 9456 states and 41892 transitions. [2021-07-13 19:59:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:59:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:59:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:59,589 INFO L225 Difference]: With dead ends: 9456 [2021-07-13 19:59:59,589 INFO L226 Difference]: Without dead ends: 9347 [2021-07-13 19:59:59,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1375.0ms TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:59:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9347 states. [2021-07-13 19:59:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9347 to 8149. [2021-07-13 19:59:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 4.496686303387334) internal successors, (36639), 8148 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 36639 transitions. [2021-07-13 19:59:59,752 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 36639 transitions. Word has length 30 [2021-07-13 19:59:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:59,752 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 36639 transitions. [2021-07-13 19:59:59,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 36639 transitions. [2021-07-13 19:59:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:59:59,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:59,768 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:59,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-07-13 19:59:59,968 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1152319630, now seen corresponding path program 51 times [2021-07-13 19:59:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:59,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332929708] [2021-07-13 19:59:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:00,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:00,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332929708] [2021-07-13 20:00:00,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332929708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:00,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911706822] [2021-07-13 20:00:00,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:00,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:00:00,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:00,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:00,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-07-13 20:00:00,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:00,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:00,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:00,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-07-13 20:00:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:00,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911706822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:00,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:00,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627029962] [2021-07-13 20:00:00,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:00,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:00,377 INFO L87 Difference]: Start difference. First operand 8149 states and 36639 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,669 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 20:00:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:03,049 INFO L93 Difference]: Finished difference Result 9749 states and 42804 transitions. [2021-07-13 20:00:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:00:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:03,075 INFO L225 Difference]: With dead ends: 9749 [2021-07-13 20:00:03,075 INFO L226 Difference]: Without dead ends: 9434 [2021-07-13 20:00:03,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2037.8ms TimeCoverageRelationStatistics Valid=719, Invalid=3973, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:00:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-07-13 20:00:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 8131. [2021-07-13 20:00:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8131 states, 8130 states have (on average 4.5) internal successors, (36585), 8130 states have internal predecessors, (36585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8131 states to 8131 states and 36585 transitions. [2021-07-13 20:00:03,261 INFO L78 Accepts]: Start accepts. Automaton has 8131 states and 36585 transitions. Word has length 30 [2021-07-13 20:00:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:03,261 INFO L482 AbstractCegarLoop]: Abstraction has 8131 states and 36585 transitions. [2021-07-13 20:00:03,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 8131 states and 36585 transitions. [2021-07-13 20:00:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:03,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:03,278 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:03,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:03,479 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash 106058870, now seen corresponding path program 55 times [2021-07-13 20:00:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:03,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291437990] [2021-07-13 20:00:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:03,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:03,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291437990] [2021-07-13 20:00:03,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291437990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:03,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238466039] [2021-07-13 20:00:03,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:03,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:00:03,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:03,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:03,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:03,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:00:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:03,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238466039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:03,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:03,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:00:03,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18413903] [2021-07-13 20:00:03,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:00:03,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:00:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:00:03,859 INFO L87 Difference]: Start difference. First operand 8131 states and 36585 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:06,365 INFO L93 Difference]: Finished difference Result 12980 states and 55445 transitions. [2021-07-13 20:00:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:00:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:06,399 INFO L225 Difference]: With dead ends: 12980 [2021-07-13 20:00:06,399 INFO L226 Difference]: Without dead ends: 12746 [2021-07-13 20:00:06,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1630.3ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:00:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2021-07-13 20:00:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 8336. [2021-07-13 20:00:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8336 states, 8335 states have (on average 4.505698860227954) internal successors, (37555), 8335 states have internal predecessors, (37555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 37555 transitions. [2021-07-13 20:00:06,644 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 37555 transitions. Word has length 30 [2021-07-13 20:00:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:06,644 INFO L482 AbstractCegarLoop]: Abstraction has 8336 states and 37555 transitions. [2021-07-13 20:00:06,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 37555 transitions. [2021-07-13 20:00:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:06,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:06,659 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:06,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:06,871 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 291052528, now seen corresponding path program 52 times [2021-07-13 20:00:06,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:06,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073100988] [2021-07-13 20:00:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:07,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:07,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073100988] [2021-07-13 20:00:07,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073100988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:07,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214389540] [2021-07-13 20:00:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:07,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:07,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:00:07,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:07,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:07,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:07,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:00:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:07,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214389540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:07,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:07,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:00:07,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387171175] [2021-07-13 20:00:07,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:00:07,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:07,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:00:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:00:07,200 INFO L87 Difference]: Start difference. First operand 8336 states and 37555 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:10,743 INFO L93 Difference]: Finished difference Result 13690 states and 58199 transitions. [2021-07-13 20:00:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:00:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:10,784 INFO L225 Difference]: With dead ends: 13690 [2021-07-13 20:00:10,784 INFO L226 Difference]: Without dead ends: 13486 [2021-07-13 20:00:10,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 2138.6ms TimeCoverageRelationStatistics Valid=784, Invalid=4618, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:00:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2021-07-13 20:00:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 8346. [2021-07-13 20:00:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8346 states, 8345 states have (on average 4.511084481725584) internal successors, (37645), 8345 states have internal predecessors, (37645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8346 states to 8346 states and 37645 transitions. [2021-07-13 20:00:11,006 INFO L78 Accepts]: Start accepts. Automaton has 8346 states and 37645 transitions. Word has length 30 [2021-07-13 20:00:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:11,006 INFO L482 AbstractCegarLoop]: Abstraction has 8346 states and 37645 transitions. [2021-07-13 20:00:11,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8346 states and 37645 transitions. [2021-07-13 20:00:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:11,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:11,024 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:11,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-13 20:00:11,237 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:11,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash -869082702, now seen corresponding path program 56 times [2021-07-13 20:00:11,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:11,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330653150] [2021-07-13 20:00:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:11,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:11,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330653150] [2021-07-13 20:00:11,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330653150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:11,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770541314] [2021-07-13 20:00:11,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:11,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:11,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:11,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:11,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:11,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:11,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:11,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:00:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:11,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770541314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:11,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:11,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:11,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375405317] [2021-07-13 20:00:11,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:11,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:11,682 INFO L87 Difference]: Start difference. First operand 8346 states and 37645 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:15,100 INFO L93 Difference]: Finished difference Result 12745 states and 54451 transitions. [2021-07-13 20:00:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:00:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:15,137 INFO L225 Difference]: With dead ends: 12745 [2021-07-13 20:00:15,137 INFO L226 Difference]: Without dead ends: 12209 [2021-07-13 20:00:15,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 2543.4ms TimeCoverageRelationStatistics Valid=937, Invalid=5705, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:00:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12209 states. [2021-07-13 20:00:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12209 to 8367. [2021-07-13 20:00:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8367 states, 8366 states have (on average 4.511714080803252) internal successors, (37745), 8366 states have internal predecessors, (37745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 37745 transitions. [2021-07-13 20:00:15,376 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 37745 transitions. Word has length 30 [2021-07-13 20:00:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:15,377 INFO L482 AbstractCegarLoop]: Abstraction has 8367 states and 37745 transitions. [2021-07-13 20:00:15,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 37745 transitions. [2021-07-13 20:00:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:15,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:15,393 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:15,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-13 20:00:15,593 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1182609098, now seen corresponding path program 57 times [2021-07-13 20:00:15,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:15,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577533160] [2021-07-13 20:00:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:15,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:15,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577533160] [2021-07-13 20:00:15,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577533160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:15,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769374322] [2021-07-13 20:00:15,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:15,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:00:15,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:15,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:15,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:15,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:15,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:15,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:00:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:16,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769374322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:16,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:16,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:16,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950829800] [2021-07-13 20:00:16,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:16,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:16,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:16,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:16,007 INFO L87 Difference]: Start difference. First operand 8367 states and 37745 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:19,224 INFO L93 Difference]: Finished difference Result 13024 states and 56439 transitions. [2021-07-13 20:00:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:00:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:19,262 INFO L225 Difference]: With dead ends: 13024 [2021-07-13 20:00:19,262 INFO L226 Difference]: Without dead ends: 12653 [2021-07-13 20:00:19,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2528.8ms TimeCoverageRelationStatistics Valid=1048, Invalid=5594, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:00:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12653 states. [2021-07-13 20:00:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12653 to 8419. [2021-07-13 20:00:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8419 states, 8418 states have (on average 4.507959135186505) internal successors, (37948), 8418 states have internal predecessors, (37948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 37948 transitions. [2021-07-13 20:00:19,483 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 37948 transitions. Word has length 30 [2021-07-13 20:00:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:19,483 INFO L482 AbstractCegarLoop]: Abstraction has 8419 states and 37948 transitions. [2021-07-13 20:00:19,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 37948 transitions. [2021-07-13 20:00:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:19,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:19,500 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:19,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-07-13 20:00:19,700 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:19,700 INFO L82 PathProgramCache]: Analyzing trace with hash 997580912, now seen corresponding path program 53 times [2021-07-13 20:00:19,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:19,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414877950] [2021-07-13 20:00:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:19,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:19,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414877950] [2021-07-13 20:00:19,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414877950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:19,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322126684] [2021-07-13 20:00:19,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:19,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:00:19,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:19,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:19,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:00:19,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:19,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:19,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:19,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 20:00:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:20,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322126684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:20,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:20,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:00:20,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552558824] [2021-07-13 20:00:20,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:00:20,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:00:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:00:20,010 INFO L87 Difference]: Start difference. First operand 8419 states and 37948 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:22,577 INFO L93 Difference]: Finished difference Result 12779 states and 55012 transitions. [2021-07-13 20:00:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:00:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:22,615 INFO L225 Difference]: With dead ends: 12779 [2021-07-13 20:00:22,616 INFO L226 Difference]: Without dead ends: 12686 [2021-07-13 20:00:22,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1603.9ms TimeCoverageRelationStatistics Valid=710, Invalid=4402, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:00:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2021-07-13 20:00:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 8432. [2021-07-13 20:00:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.508361997390582) internal successors, (38010), 8431 states have internal predecessors, (38010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 38010 transitions. [2021-07-13 20:00:22,886 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 38010 transitions. Word has length 30 [2021-07-13 20:00:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:22,886 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 38010 transitions. [2021-07-13 20:00:22,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 38010 transitions. [2021-07-13 20:00:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:22,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:22,904 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:23,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:23,104 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1115456238, now seen corresponding path program 54 times [2021-07-13 20:00:23,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:23,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965854868] [2021-07-13 20:00:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:23,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:23,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965854868] [2021-07-13 20:00:23,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965854868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:23,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580856047] [2021-07-13 20:00:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:23,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:00:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:23,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:23,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:23,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:23,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:23,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:00:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580856047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:23,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:00:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454228873] [2021-07-13 20:00:23,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:00:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:00:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:00:23,458 INFO L87 Difference]: Start difference. First operand 8432 states and 38010 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:26,012 INFO L93 Difference]: Finished difference Result 13259 states and 56756 transitions. [2021-07-13 20:00:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:00:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:26,047 INFO L225 Difference]: With dead ends: 13259 [2021-07-13 20:00:26,047 INFO L226 Difference]: Without dead ends: 13156 [2021-07-13 20:00:26,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1581.2ms TimeCoverageRelationStatistics Valid=640, Invalid=3916, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:00:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13156 states. [2021-07-13 20:00:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13156 to 8432. [2021-07-13 20:00:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.507650338038192) internal successors, (38004), 8431 states have internal predecessors, (38004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 38004 transitions. [2021-07-13 20:00:26,265 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 38004 transitions. Word has length 30 [2021-07-13 20:00:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:26,265 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 38004 transitions. [2021-07-13 20:00:26,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 38004 transitions. [2021-07-13 20:00:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:26,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:26,282 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:26,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:26,482 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:26,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1644847312, now seen corresponding path program 58 times [2021-07-13 20:00:26,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:26,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898338293] [2021-07-13 20:00:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:26,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:26,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898338293] [2021-07-13 20:00:26,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898338293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:26,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907714930] [2021-07-13 20:00:26,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:26,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:26,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:26,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:26,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:00:26,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:26,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:26,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:26,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 20:00:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:26,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907714930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:26,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:26,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:00:26,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536688169] [2021-07-13 20:00:26,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:00:26,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:26,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:00:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:00:26,840 INFO L87 Difference]: Start difference. First operand 8432 states and 38004 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:29,477 INFO L93 Difference]: Finished difference Result 14578 states and 61676 transitions. [2021-07-13 20:00:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:00:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:29,518 INFO L225 Difference]: With dead ends: 14578 [2021-07-13 20:00:29,518 INFO L226 Difference]: Without dead ends: 14309 [2021-07-13 20:00:29,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1624.8ms TimeCoverageRelationStatistics Valid=627, Invalid=3929, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:00:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-07-13 20:00:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 8664. [2021-07-13 20:00:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8664 states, 8663 states have (on average 4.510446727461618) internal successors, (39074), 8663 states have internal predecessors, (39074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8664 states to 8664 states and 39074 transitions. [2021-07-13 20:00:29,769 INFO L78 Accepts]: Start accepts. Automaton has 8664 states and 39074 transitions. Word has length 30 [2021-07-13 20:00:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:29,769 INFO L482 AbstractCegarLoop]: Abstraction has 8664 states and 39074 transitions. [2021-07-13 20:00:29,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8664 states and 39074 transitions. [2021-07-13 20:00:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:29,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:29,786 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:29,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-07-13 20:00:29,986 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:29,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1829840970, now seen corresponding path program 55 times [2021-07-13 20:00:29,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:29,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878551590] [2021-07-13 20:00:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:30,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:30,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878551590] [2021-07-13 20:00:30,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878551590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:30,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172808921] [2021-07-13 20:00:30,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:30,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:00:30,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:30,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:30,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:30,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 20:00:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:30,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172808921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:30,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:30,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:00:30,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222663360] [2021-07-13 20:00:30,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:00:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:00:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:00:30,368 INFO L87 Difference]: Start difference. First operand 8664 states and 39074 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:33,588 INFO L93 Difference]: Finished difference Result 14983 states and 63275 transitions. [2021-07-13 20:00:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:00:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:33,635 INFO L225 Difference]: With dead ends: 14983 [2021-07-13 20:00:33,635 INFO L226 Difference]: Without dead ends: 14789 [2021-07-13 20:00:33,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 1781.3ms TimeCoverageRelationStatistics Valid=821, Invalid=5031, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:00:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14789 states. [2021-07-13 20:00:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14789 to 8644. [2021-07-13 20:00:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 4.511859308110609) internal successors, (38996), 8643 states have internal predecessors, (38996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 38996 transitions. [2021-07-13 20:00:33,896 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 38996 transitions. Word has length 30 [2021-07-13 20:00:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:33,897 INFO L482 AbstractCegarLoop]: Abstraction has 8644 states and 38996 transitions. [2021-07-13 20:00:33,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 38996 transitions. [2021-07-13 20:00:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:33,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:33,915 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:34,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:34,117 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1510385476, now seen corresponding path program 59 times [2021-07-13 20:00:34,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:34,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571724287] [2021-07-13 20:00:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:34,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:34,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571724287] [2021-07-13 20:00:34,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571724287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:34,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876482349] [2021-07-13 20:00:34,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:34,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:00:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:34,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:34,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:00:34,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:34,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:34,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:34,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:00:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:34,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876482349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:34,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:34,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:00:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420259500] [2021-07-13 20:00:34,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:00:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:00:34,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:00:34,486 INFO L87 Difference]: Start difference. First operand 8644 states and 38996 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:36,529 INFO L93 Difference]: Finished difference Result 11759 states and 50895 transitions. [2021-07-13 20:00:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:00:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:36,562 INFO L225 Difference]: With dead ends: 11759 [2021-07-13 20:00:36,562 INFO L226 Difference]: Without dead ends: 11668 [2021-07-13 20:00:36,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1351.4ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:00:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11668 states. [2021-07-13 20:00:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11668 to 8644. [2021-07-13 20:00:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 4.511859308110609) internal successors, (38996), 8643 states have internal predecessors, (38996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 38996 transitions. [2021-07-13 20:00:36,770 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 38996 transitions. Word has length 30 [2021-07-13 20:00:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:36,770 INFO L482 AbstractCegarLoop]: Abstraction has 8644 states and 38996 transitions. [2021-07-13 20:00:36,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 38996 transitions. [2021-07-13 20:00:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:36,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:36,787 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:36,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-13 20:00:36,988 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1172103252, now seen corresponding path program 60 times [2021-07-13 20:00:36,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:36,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108188001] [2021-07-13 20:00:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:37,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108188001] [2021-07-13 20:00:37,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108188001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319657388] [2021-07-13 20:00:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:37,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:00:37,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:37,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:37,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:37,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:37,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:37,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:37,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:37,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:37,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:00:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:37,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319657388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:37,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:37,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541298298] [2021-07-13 20:00:37,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:37,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:37,401 INFO L87 Difference]: Start difference. First operand 8644 states and 38996 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:41,576 INFO L93 Difference]: Finished difference Result 14186 states and 60111 transitions. [2021-07-13 20:00:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:00:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:41,617 INFO L225 Difference]: With dead ends: 14186 [2021-07-13 20:00:41,617 INFO L226 Difference]: Without dead ends: 13820 [2021-07-13 20:00:41,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 2492.6ms TimeCoverageRelationStatistics Valid=846, Invalid=7344, Unknown=0, NotChecked=0, Total=8190 [2021-07-13 20:00:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13820 states. [2021-07-13 20:00:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13820 to 8969. [2021-07-13 20:00:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 4.516503122212311) internal successors, (40504), 8968 states have internal predecessors, (40504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 40504 transitions. [2021-07-13 20:00:41,885 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 40504 transitions. Word has length 30 [2021-07-13 20:00:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:41,885 INFO L482 AbstractCegarLoop]: Abstraction has 8969 states and 40504 transitions. [2021-07-13 20:00:41,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 40504 transitions. [2021-07-13 20:00:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:41,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:41,904 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:42,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:42,105 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash 314992000, now seen corresponding path program 56 times [2021-07-13 20:00:42,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:42,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445579722] [2021-07-13 20:00:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:42,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445579722] [2021-07-13 20:00:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445579722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17094123] [2021-07-13 20:00:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:42,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:42,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:42,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:42,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:42,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:42,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:42,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:42,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:42,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:00:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:42,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17094123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:42,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:42,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:00:42,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885381971] [2021-07-13 20:00:42,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:00:42,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:42,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:00:42,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:00:42,510 INFO L87 Difference]: Start difference. First operand 8969 states and 40504 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:45,491 INFO L93 Difference]: Finished difference Result 13406 states and 57733 transitions. [2021-07-13 20:00:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:00:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:45,530 INFO L225 Difference]: With dead ends: 13406 [2021-07-13 20:00:45,530 INFO L226 Difference]: Without dead ends: 13237 [2021-07-13 20:00:45,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1834.8ms TimeCoverageRelationStatistics Valid=610, Invalid=4792, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:00:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13237 states. [2021-07-13 20:00:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13237 to 8990. [2021-07-13 20:00:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8989 states have (on average 4.515073979308043) internal successors, (40586), 8989 states have internal predecessors, (40586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40586 transitions. [2021-07-13 20:00:45,778 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40586 transitions. Word has length 30 [2021-07-13 20:00:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:45,778 INFO L482 AbstractCegarLoop]: Abstraction has 8990 states and 40586 transitions. [2021-07-13 20:00:45,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40586 transitions. [2021-07-13 20:00:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:45,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:45,858 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:46,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-13 20:00:46,059 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2081020532, now seen corresponding path program 57 times [2021-07-13 20:00:46,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:46,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282277601] [2021-07-13 20:00:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:46,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:46,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282277601] [2021-07-13 20:00:46,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282277601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:46,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329097886] [2021-07-13 20:00:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:46,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:00:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:46,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:46,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:46,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:46,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:46,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:46,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:00:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329097886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:46,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:46,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92943342] [2021-07-13 20:00:46,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:46,447 INFO L87 Difference]: Start difference. First operand 8990 states and 40586 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:50,847 INFO L93 Difference]: Finished difference Result 14831 states and 62753 transitions. [2021-07-13 20:00:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:00:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:50,889 INFO L225 Difference]: With dead ends: 14831 [2021-07-13 20:00:50,889 INFO L226 Difference]: Without dead ends: 14499 [2021-07-13 20:00:50,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 2820.1ms TimeCoverageRelationStatistics Valid=1030, Invalid=8870, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:00:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14499 states. [2021-07-13 20:00:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14499 to 9142. [2021-07-13 20:00:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 4.520183787331802) internal successors, (41319), 9141 states have internal predecessors, (41319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 41319 transitions. [2021-07-13 20:00:51,213 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 41319 transitions. Word has length 30 [2021-07-13 20:00:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:51,213 INFO L482 AbstractCegarLoop]: Abstraction has 9142 states and 41319 transitions. [2021-07-13 20:00:51,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 41319 transitions. [2021-07-13 20:00:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:51,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:51,231 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:51,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:51,432 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1966270066, now seen corresponding path program 61 times [2021-07-13 20:00:51,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:51,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425050951] [2021-07-13 20:00:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:51,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:51,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425050951] [2021-07-13 20:00:51,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425050951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:51,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480541501] [2021-07-13 20:00:51,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:00:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:00:51,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:51,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:51,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:51,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 20:00:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:51,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480541501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:51,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:51,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:00:51,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101164066] [2021-07-13 20:00:51,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:00:51,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:51,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:00:51,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:00:51,772 INFO L87 Difference]: Start difference. First operand 9142 states and 41319 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:53,782 INFO L93 Difference]: Finished difference Result 12965 states and 56453 transitions. [2021-07-13 20:00:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:00:53,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:53,879 INFO L225 Difference]: With dead ends: 12965 [2021-07-13 20:00:53,880 INFO L226 Difference]: Without dead ends: 12844 [2021-07-13 20:00:53,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 1304.0ms TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:00:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-07-13 20:00:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 9180. [2021-07-13 20:00:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 4.517049787558558) internal successors, (41462), 9179 states have internal predecessors, (41462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 41462 transitions. [2021-07-13 20:00:54,099 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 41462 transitions. Word has length 30 [2021-07-13 20:00:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:54,099 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 41462 transitions. [2021-07-13 20:00:54,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 41462 transitions. [2021-07-13 20:00:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:54,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:54,118 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:54,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:54,318 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash -953481476, now seen corresponding path program 62 times [2021-07-13 20:00:54,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:54,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172083947] [2021-07-13 20:00:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:54,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:54,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172083947] [2021-07-13 20:00:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172083947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:54,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032884381] [2021-07-13 20:00:54,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:54,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:54,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:54,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:54,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:54,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:54,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:54,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:00:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:54,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032884381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:54,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:54,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:54,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316439354] [2021-07-13 20:00:54,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:54,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:54,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:54,762 INFO L87 Difference]: Start difference. First operand 9180 states and 41462 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:57,783 INFO L93 Difference]: Finished difference Result 11681 states and 51110 transitions. [2021-07-13 20:00:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:00:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:00:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:57,816 INFO L225 Difference]: With dead ends: 11681 [2021-07-13 20:00:57,816 INFO L226 Difference]: Without dead ends: 11473 [2021-07-13 20:00:57,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2175.6ms TimeCoverageRelationStatistics Valid=666, Invalid=4304, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:00:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11473 states. [2021-07-13 20:00:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11473 to 9193. [2021-07-13 20:00:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 4.516753698868581) internal successors, (41518), 9192 states have internal predecessors, (41518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 41518 transitions. [2021-07-13 20:00:58,037 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 41518 transitions. Word has length 30 [2021-07-13 20:00:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:58,037 INFO L482 AbstractCegarLoop]: Abstraction has 9193 states and 41518 transitions. [2021-07-13 20:00:58,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 41518 transitions. [2021-07-13 20:00:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:00:58,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:58,055 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:58,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-07-13 20:00:58,256 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:58,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1267007872, now seen corresponding path program 63 times [2021-07-13 20:00:58,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:58,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316860179] [2021-07-13 20:00:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:58,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:58,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316860179] [2021-07-13 20:00:58,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316860179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:58,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467830233] [2021-07-13 20:00:58,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:58,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:00:58,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:58,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:00:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:58,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:58,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:00:58,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:58,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:00:58,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:58,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:00:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:58,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467830233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:58,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:58,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:00:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365011870] [2021-07-13 20:00:58,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:00:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:00:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:00:58,720 INFO L87 Difference]: Start difference. First operand 9193 states and 41518 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:01,530 INFO L93 Difference]: Finished difference Result 11719 states and 51625 transitions. [2021-07-13 20:01:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:01:01,530 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:01,561 INFO L225 Difference]: With dead ends: 11719 [2021-07-13 20:01:01,561 INFO L226 Difference]: Without dead ends: 11495 [2021-07-13 20:01:01,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2145.1ms TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:01:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11495 states. [2021-07-13 20:01:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11495 to 9186. [2021-07-13 20:01:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 4.517365269461078) internal successors, (41492), 9185 states have internal predecessors, (41492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 41492 transitions. [2021-07-13 20:01:01,769 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 41492 transitions. Word has length 30 [2021-07-13 20:01:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:01,769 INFO L482 AbstractCegarLoop]: Abstraction has 9186 states and 41492 transitions. [2021-07-13 20:01:01,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 41492 transitions. [2021-07-13 20:01:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:01,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:01,788 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:01,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-13 20:01:01,988 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 343082850, now seen corresponding path program 64 times [2021-07-13 20:01:01,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:01,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361471928] [2021-07-13 20:01:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:02,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:02,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361471928] [2021-07-13 20:01:02,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361471928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:02,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102180064] [2021-07-13 20:01:02,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:02,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:02,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:02,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:02,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:02,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:02,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:02,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102180064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:02,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:02,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:01:02,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979594636] [2021-07-13 20:01:02,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:01:02,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:01:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:01:02,336 INFO L87 Difference]: Start difference. First operand 9186 states and 41492 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:04,560 INFO L93 Difference]: Finished difference Result 11646 states and 51132 transitions. [2021-07-13 20:01:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:01:04,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:04,592 INFO L225 Difference]: With dead ends: 11646 [2021-07-13 20:01:04,592 INFO L226 Difference]: Without dead ends: 11541 [2021-07-13 20:01:04,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1569.5ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:01:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11541 states. [2021-07-13 20:01:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11541 to 9188. [2021-07-13 20:01:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9188 states, 9187 states have (on average 4.517470338521824) internal successors, (41502), 9187 states have internal predecessors, (41502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9188 states to 9188 states and 41502 transitions. [2021-07-13 20:01:04,813 INFO L78 Accepts]: Start accepts. Automaton has 9188 states and 41502 transitions. Word has length 30 [2021-07-13 20:01:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:04,813 INFO L482 AbstractCegarLoop]: Abstraction has 9188 states and 41502 transitions. [2021-07-13 20:01:04,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 9188 states and 41502 transitions. [2021-07-13 20:01:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:04,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:04,831 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:05,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-07-13 20:01:05,032 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1007485592, now seen corresponding path program 65 times [2021-07-13 20:01:05,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:05,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886832598] [2021-07-13 20:01:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:05,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886832598] [2021-07-13 20:01:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886832598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147405878] [2021-07-13 20:01:05,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:05,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:05,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:05,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:05,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:05,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:05,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:05,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:05,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147405878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:05,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:05,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:01:05,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639059451] [2021-07-13 20:01:05,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:01:05,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:05,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:01:05,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:01:05,370 INFO L87 Difference]: Start difference. First operand 9188 states and 41502 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:07,465 INFO L93 Difference]: Finished difference Result 12741 states and 55006 transitions. [2021-07-13 20:01:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:01:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:07,502 INFO L225 Difference]: With dead ends: 12741 [2021-07-13 20:01:07,502 INFO L226 Difference]: Without dead ends: 12647 [2021-07-13 20:01:07,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1499.5ms TimeCoverageRelationStatistics Valid=742, Invalid=4088, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:01:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12647 states. [2021-07-13 20:01:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12647 to 9207. [2021-07-13 20:01:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9207 states, 9206 states have (on average 4.517597219204866) internal successors, (41589), 9206 states have internal predecessors, (41589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 41589 transitions. [2021-07-13 20:01:07,744 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 41589 transitions. Word has length 30 [2021-07-13 20:01:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:07,744 INFO L482 AbstractCegarLoop]: Abstraction has 9207 states and 41589 transitions. [2021-07-13 20:01:07,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 41589 transitions. [2021-07-13 20:01:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:07,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:07,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:07,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:07,965 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -375717864, now seen corresponding path program 66 times [2021-07-13 20:01:07,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:07,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693254989] [2021-07-13 20:01:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:08,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693254989] [2021-07-13 20:01:08,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693254989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487748124] [2021-07-13 20:01:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:08,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:01:08,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:01:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:08,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:01:08,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:08,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:08,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:08,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-13 20:01:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:08,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487748124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:08,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:08,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:01:08,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29098184] [2021-07-13 20:01:08,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:01:08,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:01:08,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:01:08,432 INFO L87 Difference]: Start difference. First operand 9207 states and 41589 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:11,877 INFO L93 Difference]: Finished difference Result 11871 states and 52030 transitions. [2021-07-13 20:01:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:01:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:11,910 INFO L225 Difference]: With dead ends: 11871 [2021-07-13 20:01:11,910 INFO L226 Difference]: Without dead ends: 11588 [2021-07-13 20:01:11,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2519.7ms TimeCoverageRelationStatistics Valid=1061, Invalid=5581, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:01:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11588 states. [2021-07-13 20:01:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11588 to 9216. [2021-07-13 20:01:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 4.516766142159523) internal successors, (41622), 9215 states have internal predecessors, (41622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 41622 transitions. [2021-07-13 20:01:12,115 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 41622 transitions. Word has length 30 [2021-07-13 20:01:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:12,115 INFO L482 AbstractCegarLoop]: Abstraction has 9216 states and 41622 transitions. [2021-07-13 20:01:12,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 41622 transitions. [2021-07-13 20:01:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:12,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:12,136 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:12,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:12,336 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2135008526, now seen corresponding path program 67 times [2021-07-13 20:01:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:12,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837366412] [2021-07-13 20:01:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:12,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837366412] [2021-07-13 20:01:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837366412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193510735] [2021-07-13 20:01:12,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:12,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:12,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:12,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:12,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:12,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:12,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193510735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:12,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:12,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:01:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41642463] [2021-07-13 20:01:12,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:12,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:12,685 INFO L87 Difference]: Start difference. First operand 9216 states and 41622 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:15,360 INFO L93 Difference]: Finished difference Result 13587 states and 58912 transitions. [2021-07-13 20:01:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:01:15,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:15,399 INFO L225 Difference]: With dead ends: 13587 [2021-07-13 20:01:15,399 INFO L226 Difference]: Without dead ends: 13479 [2021-07-13 20:01:15,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1935.6ms TimeCoverageRelationStatistics Valid=1140, Invalid=6000, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:01:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13479 states. [2021-07-13 20:01:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13479 to 9240. [2021-07-13 20:01:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9240 states, 9239 states have (on average 4.517372009957787) internal successors, (41736), 9239 states have internal predecessors, (41736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9240 states to 9240 states and 41736 transitions. [2021-07-13 20:01:15,640 INFO L78 Accepts]: Start accepts. Automaton has 9240 states and 41736 transitions. Word has length 30 [2021-07-13 20:01:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:15,640 INFO L482 AbstractCegarLoop]: Abstraction has 9240 states and 41736 transitions. [2021-07-13 20:01:15,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9240 states and 41736 transitions. [2021-07-13 20:01:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:15,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:15,658 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:15,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:15,859 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash -587718528, now seen corresponding path program 58 times [2021-07-13 20:01:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:15,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102611676] [2021-07-13 20:01:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:15,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102611676] [2021-07-13 20:01:15,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102611676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927668218] [2021-07-13 20:01:15,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:16,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:16,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:16,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:16,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:16,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:16,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:16,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:16,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927668218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:16,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:16,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:01:16,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639957085] [2021-07-13 20:01:16,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:01:16,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:01:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:01:16,175 INFO L87 Difference]: Start difference. First operand 9240 states and 41736 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:18,517 INFO L93 Difference]: Finished difference Result 11652 states and 51331 transitions. [2021-07-13 20:01:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:01:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:18,549 INFO L225 Difference]: With dead ends: 11652 [2021-07-13 20:01:18,549 INFO L226 Difference]: Without dead ends: 11539 [2021-07-13 20:01:18,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1655.7ms TimeCoverageRelationStatistics Valid=601, Invalid=3059, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:01:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11539 states. [2021-07-13 20:01:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11539 to 9263. [2021-07-13 20:01:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 4.5182465990066945) internal successors, (41848), 9262 states have internal predecessors, (41848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 41848 transitions. [2021-07-13 20:01:18,814 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 41848 transitions. Word has length 30 [2021-07-13 20:01:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:18,815 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 41848 transitions. [2021-07-13 20:01:18,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 41848 transitions. [2021-07-13 20:01:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:18,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:18,833 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:19,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:19,033 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:19,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1044003546, now seen corresponding path program 59 times [2021-07-13 20:01:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:19,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542346228] [2021-07-13 20:01:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:19,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542346228] [2021-07-13 20:01:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542346228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015559749] [2021-07-13 20:01:19,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:19,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:19,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:19,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:19,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:19,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:19,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:19,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:19,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:19,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015559749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:19,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:19,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:01:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030372400] [2021-07-13 20:01:19,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:01:19,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:01:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:01:19,349 INFO L87 Difference]: Start difference. First operand 9263 states and 41848 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:21,144 INFO L93 Difference]: Finished difference Result 11561 states and 51021 transitions. [2021-07-13 20:01:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:01:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:21,175 INFO L225 Difference]: With dead ends: 11561 [2021-07-13 20:01:21,176 INFO L226 Difference]: Without dead ends: 11452 [2021-07-13 20:01:21,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1203.5ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:01:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-07-13 20:01:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 9261. [2021-07-13 20:01:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.517278617710583) internal successors, (41830), 9260 states have internal predecessors, (41830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 41830 transitions. [2021-07-13 20:01:21,461 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 41830 transitions. Word has length 30 [2021-07-13 20:01:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 41830 transitions. [2021-07-13 20:01:21,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 41830 transitions. [2021-07-13 20:01:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:21,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:21,480 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:21,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:21,680 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 708845798, now seen corresponding path program 60 times [2021-07-13 20:01:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:21,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715019310] [2021-07-13 20:01:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:21,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:21,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715019310] [2021-07-13 20:01:21,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715019310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:21,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366399734] [2021-07-13 20:01:21,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:21,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:01:21,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:21,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:21,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:01:21,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:21,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:21,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:21,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-13 20:01:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:22,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366399734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:22,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:22,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:01:22,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665629231] [2021-07-13 20:01:22,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:22,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:22,158 INFO L87 Difference]: Start difference. First operand 9261 states and 41830 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:24,494 INFO L93 Difference]: Finished difference Result 10741 states and 47646 transitions. [2021-07-13 20:01:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:01:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:24,523 INFO L225 Difference]: With dead ends: 10741 [2021-07-13 20:01:24,523 INFO L226 Difference]: Without dead ends: 10587 [2021-07-13 20:01:24,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1778.2ms TimeCoverageRelationStatistics Valid=542, Invalid=3118, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:01:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2021-07-13 20:01:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 9264. [2021-07-13 20:01:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9264 states, 9263 states have (on average 4.517542912663284) internal successors, (41846), 9263 states have internal predecessors, (41846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9264 states to 9264 states and 41846 transitions. [2021-07-13 20:01:24,726 INFO L78 Accepts]: Start accepts. Automaton has 9264 states and 41846 transitions. Word has length 30 [2021-07-13 20:01:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:24,726 INFO L482 AbstractCegarLoop]: Abstraction has 9264 states and 41846 transitions. [2021-07-13 20:01:24,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9264 states and 41846 transitions. [2021-07-13 20:01:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:24,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:24,745 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:24,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:24,945 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1096405240, now seen corresponding path program 61 times [2021-07-13 20:01:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:24,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416398547] [2021-07-13 20:01:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:25,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416398547] [2021-07-13 20:01:25,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416398547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127308148] [2021-07-13 20:01:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:25,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:25,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:25,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:25,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:25,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:25,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:25,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127308148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:25,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:25,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:01:25,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656752770] [2021-07-13 20:01:25,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:25,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:25,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:25,270 INFO L87 Difference]: Start difference. First operand 9264 states and 41846 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:27,610 INFO L93 Difference]: Finished difference Result 11749 states and 51741 transitions. [2021-07-13 20:01:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:01:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:27,642 INFO L225 Difference]: With dead ends: 11749 [2021-07-13 20:01:27,643 INFO L226 Difference]: Without dead ends: 11646 [2021-07-13 20:01:27,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1575.3ms TimeCoverageRelationStatistics Valid=583, Invalid=2957, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:01:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11646 states. [2021-07-13 20:01:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11646 to 9272. [2021-07-13 20:01:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9271 states have (on average 4.518606407075828) internal successors, (41892), 9271 states have internal predecessors, (41892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 41892 transitions. [2021-07-13 20:01:27,872 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 41892 transitions. Word has length 30 [2021-07-13 20:01:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:27,872 INFO L482 AbstractCegarLoop]: Abstraction has 9272 states and 41892 transitions. [2021-07-13 20:01:27,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 41892 transitions. [2021-07-13 20:01:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:27,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:27,890 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:28,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-07-13 20:01:28,090 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:28,091 INFO L82 PathProgramCache]: Analyzing trace with hash 456788344, now seen corresponding path program 62 times [2021-07-13 20:01:28,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:28,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816534853] [2021-07-13 20:01:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:28,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:28,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816534853] [2021-07-13 20:01:28,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816534853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:28,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412904082] [2021-07-13 20:01:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:28,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:01:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:28,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:01:28,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:28,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:28,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:28,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:01:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:28,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412904082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:28,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:28,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:01:28,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99934277] [2021-07-13 20:01:28,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:28,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:28,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:28,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:28,481 INFO L87 Difference]: Start difference. First operand 9272 states and 41892 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:30,478 INFO L93 Difference]: Finished difference Result 11839 states and 51537 transitions. [2021-07-13 20:01:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:01:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:30,513 INFO L225 Difference]: With dead ends: 11839 [2021-07-13 20:01:30,513 INFO L226 Difference]: Without dead ends: 11764 [2021-07-13 20:01:30,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1358.0ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:01:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2021-07-13 20:01:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 9272. [2021-07-13 20:01:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9271 states have (on average 4.517851364469852) internal successors, (41885), 9271 states have internal predecessors, (41885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 41885 transitions. [2021-07-13 20:01:30,725 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 41885 transitions. Word has length 30 [2021-07-13 20:01:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:30,725 INFO L482 AbstractCegarLoop]: Abstraction has 9272 states and 41885 transitions. [2021-07-13 20:01:30,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 41885 transitions. [2021-07-13 20:01:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:30,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:30,742 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:30,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-07-13 20:01:30,943 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1957586502, now seen corresponding path program 63 times [2021-07-13 20:01:30,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:30,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034636234] [2021-07-13 20:01:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:31,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:31,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034636234] [2021-07-13 20:01:31,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034636234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:31,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229856697] [2021-07-13 20:01:31,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:31,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:01:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:01:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:31,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:31,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:01:31,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:31,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:31,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:31,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:01:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:31,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229856697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:31,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:31,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:01:31,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700644894] [2021-07-13 20:01:31,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:31,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:31,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:31,380 INFO L87 Difference]: Start difference. First operand 9272 states and 41885 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:33,899 INFO L93 Difference]: Finished difference Result 11742 states and 51677 transitions. [2021-07-13 20:01:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:01:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:33,928 INFO L225 Difference]: With dead ends: 11742 [2021-07-13 20:01:33,928 INFO L226 Difference]: Without dead ends: 11580 [2021-07-13 20:01:33,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1826.7ms TimeCoverageRelationStatistics Valid=755, Invalid=4357, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:01:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2021-07-13 20:01:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 9267. [2021-07-13 20:01:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 4.518238722210231) internal successors, (41866), 9266 states have internal predecessors, (41866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 41866 transitions. [2021-07-13 20:01:34,131 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 41866 transitions. Word has length 30 [2021-07-13 20:01:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:34,131 INFO L482 AbstractCegarLoop]: Abstraction has 9267 states and 41866 transitions. [2021-07-13 20:01:34,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 41866 transitions. [2021-07-13 20:01:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:34,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:34,148 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:34,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:34,349 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash -95445832, now seen corresponding path program 64 times [2021-07-13 20:01:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:34,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707083201] [2021-07-13 20:01:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:34,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:34,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707083201] [2021-07-13 20:01:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707083201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225475846] [2021-07-13 20:01:34,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:34,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:34,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:34,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:34,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:34,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:34,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:34,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:34,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:34,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225475846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:34,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:34,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:01:34,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381653970] [2021-07-13 20:01:34,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:34,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:34,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:34,691 INFO L87 Difference]: Start difference. First operand 9267 states and 41866 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:38,025 INFO L93 Difference]: Finished difference Result 13289 states and 57768 transitions. [2021-07-13 20:01:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:01:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:38,061 INFO L225 Difference]: With dead ends: 13289 [2021-07-13 20:01:38,061 INFO L226 Difference]: Without dead ends: 13123 [2021-07-13 20:01:38,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2343.9ms TimeCoverageRelationStatistics Valid=1125, Invalid=6185, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:01:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13123 states. [2021-07-13 20:01:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13123 to 9283. [2021-07-13 20:01:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 4.518099547511312) internal successors, (41937), 9282 states have internal predecessors, (41937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 41937 transitions. [2021-07-13 20:01:38,297 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 41937 transitions. Word has length 30 [2021-07-13 20:01:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:38,297 INFO L482 AbstractCegarLoop]: Abstraction has 9283 states and 41937 transitions. [2021-07-13 20:01:38,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 41937 transitions. [2021-07-13 20:01:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:38,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:38,315 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:38,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-07-13 20:01:38,516 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash -731912686, now seen corresponding path program 65 times [2021-07-13 20:01:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:38,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915694038] [2021-07-13 20:01:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:38,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:38,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915694038] [2021-07-13 20:01:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915694038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:38,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759945600] [2021-07-13 20:01:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:38,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:38,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:01:38,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:38,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:38,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:38,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:01:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:38,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759945600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:38,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:38,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:01:38,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691808287] [2021-07-13 20:01:38,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:38,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:38,898 INFO L87 Difference]: Start difference. First operand 9283 states and 41937 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:41,713 INFO L93 Difference]: Finished difference Result 13221 states and 57333 transitions. [2021-07-13 20:01:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:01:41,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:41,748 INFO L225 Difference]: With dead ends: 13221 [2021-07-13 20:01:41,748 INFO L226 Difference]: Without dead ends: 13140 [2021-07-13 20:01:41,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 1988.8ms TimeCoverageRelationStatistics Valid=1085, Invalid=5721, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:01:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13140 states. [2021-07-13 20:01:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13140 to 9266. [2021-07-13 20:01:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9266 states, 9265 states have (on average 4.518078791149487) internal successors, (41860), 9265 states have internal predecessors, (41860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9266 states to 9266 states and 41860 transitions. [2021-07-13 20:01:41,974 INFO L78 Accepts]: Start accepts. Automaton has 9266 states and 41860 transitions. Word has length 30 [2021-07-13 20:01:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:41,974 INFO L482 AbstractCegarLoop]: Abstraction has 9266 states and 41860 transitions. [2021-07-13 20:01:41,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 9266 states and 41860 transitions. [2021-07-13 20:01:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:41,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:41,992 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:42,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:42,193 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:42,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1293295150, now seen corresponding path program 28 times [2021-07-13 20:01:42,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:42,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625425275] [2021-07-13 20:01:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:42,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625425275] [2021-07-13 20:01:42,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625425275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465309297] [2021-07-13 20:01:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:42,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:42,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:42,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:42,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:42,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:42,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-13 20:01:42,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:42,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:42,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:42,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-13 20:01:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:42,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465309297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:42,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:42,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:01:42,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312823923] [2021-07-13 20:01:42,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:01:42,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:01:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:01:42,592 INFO L87 Difference]: Start difference. First operand 9266 states and 41860 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:44,056 INFO L93 Difference]: Finished difference Result 11779 states and 51038 transitions. [2021-07-13 20:01:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:01:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:44,087 INFO L225 Difference]: With dead ends: 11779 [2021-07-13 20:01:44,087 INFO L226 Difference]: Without dead ends: 11662 [2021-07-13 20:01:44,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:01:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11662 states. [2021-07-13 20:01:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11662 to 9311. [2021-07-13 20:01:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9311 states, 9310 states have (on average 4.51890440386681) internal successors, (42071), 9310 states have internal predecessors, (42071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9311 states to 9311 states and 42071 transitions. [2021-07-13 20:01:44,304 INFO L78 Accepts]: Start accepts. Automaton has 9311 states and 42071 transitions. Word has length 30 [2021-07-13 20:01:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:44,304 INFO L482 AbstractCegarLoop]: Abstraction has 9311 states and 42071 transitions. [2021-07-13 20:01:44,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9311 states and 42071 transitions. [2021-07-13 20:01:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:44,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:44,323 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:44,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-13 20:01:44,523 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1108301492, now seen corresponding path program 5 times [2021-07-13 20:01:44,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:44,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193413815] [2021-07-13 20:01:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:44,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193413815] [2021-07-13 20:01:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193413815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760471409] [2021-07-13 20:01:44,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:44,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:01:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:44,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-13 20:01:44,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:44,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:44,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:44,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-13 20:01:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:44,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760471409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:44,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:44,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-13 20:01:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137683668] [2021-07-13 20:01:44,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:01:44,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:01:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:01:44,872 INFO L87 Difference]: Start difference. First operand 9311 states and 42071 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:45,545 INFO L93 Difference]: Finished difference Result 10177 states and 45497 transitions. [2021-07-13 20:01:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:01:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:45,572 INFO L225 Difference]: With dead ends: 10177 [2021-07-13 20:01:45,572 INFO L226 Difference]: Without dead ends: 9971 [2021-07-13 20:01:45,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:01:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2021-07-13 20:01:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 9340. [2021-07-13 20:01:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9340 states, 9339 states have (on average 4.515686904379484) internal successors, (42172), 9339 states have internal predecessors, (42172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9340 states to 9340 states and 42172 transitions. [2021-07-13 20:01:45,812 INFO L78 Accepts]: Start accepts. Automaton has 9340 states and 42172 transitions. Word has length 30 [2021-07-13 20:01:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:45,812 INFO L482 AbstractCegarLoop]: Abstraction has 9340 states and 42172 transitions. [2021-07-13 20:01:45,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 9340 states and 42172 transitions. [2021-07-13 20:01:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:45,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:45,831 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:46,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:46,031 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:46,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2026530574, now seen corresponding path program 29 times [2021-07-13 20:01:46,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:46,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604583921] [2021-07-13 20:01:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:46,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:46,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604583921] [2021-07-13 20:01:46,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604583921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:46,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904801488] [2021-07-13 20:01:46,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:46,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:01:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:46,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:46,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:46,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:01:46,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:46,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:46,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:46,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:01:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:46,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904801488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:46,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:46,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:01:46,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639884239] [2021-07-13 20:01:46,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:01:46,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:01:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:01:46,413 INFO L87 Difference]: Start difference. First operand 9340 states and 42172 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:47,543 INFO L93 Difference]: Finished difference Result 10870 states and 47950 transitions. [2021-07-13 20:01:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:01:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:47,572 INFO L225 Difference]: With dead ends: 10870 [2021-07-13 20:01:47,572 INFO L226 Difference]: Without dead ends: 10710 [2021-07-13 20:01:47,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:01:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-07-13 20:01:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 9399. [2021-07-13 20:01:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 4.519046605660779) internal successors, (42470), 9398 states have internal predecessors, (42470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 42470 transitions. [2021-07-13 20:01:47,852 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 42470 transitions. Word has length 30 [2021-07-13 20:01:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:47,852 INFO L482 AbstractCegarLoop]: Abstraction has 9399 states and 42470 transitions. [2021-07-13 20:01:47,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 42470 transitions. [2021-07-13 20:01:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:47,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:47,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:48,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable626 [2021-07-13 20:01:48,071 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1713004178, now seen corresponding path program 30 times [2021-07-13 20:01:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:48,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842190939] [2021-07-13 20:01:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:48,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:48,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842190939] [2021-07-13 20:01:48,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842190939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:48,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920118625] [2021-07-13 20:01:48,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:48,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:01:48,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:01:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:48,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:48,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:01:48,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:48,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:48,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:48,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-13 20:01:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:48,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920118625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:48,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:48,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:01:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775587565] [2021-07-13 20:01:48,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:01:48,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:01:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:01:48,588 INFO L87 Difference]: Start difference. First operand 9399 states and 42470 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:50,597 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-07-13 20:01:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:51,158 INFO L93 Difference]: Finished difference Result 10543 states and 46799 transitions. [2021-07-13 20:01:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:01:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:51,187 INFO L225 Difference]: With dead ends: 10543 [2021-07-13 20:01:51,187 INFO L226 Difference]: Without dead ends: 10255 [2021-07-13 20:01:51,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2043.7ms TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:01:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-07-13 20:01:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 9406. [2021-07-13 20:01:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9406 states, 9405 states have (on average 4.5155768208399785) internal successors, (42469), 9405 states have internal predecessors, (42469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9406 states to 9406 states and 42469 transitions. [2021-07-13 20:01:51,389 INFO L78 Accepts]: Start accepts. Automaton has 9406 states and 42469 transitions. Word has length 30 [2021-07-13 20:01:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:51,389 INFO L482 AbstractCegarLoop]: Abstraction has 9406 states and 42469 transitions. [2021-07-13 20:01:51,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9406 states and 42469 transitions. [2021-07-13 20:01:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:51,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:51,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:51,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:51,608 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:51,609 INFO L82 PathProgramCache]: Analyzing trace with hash -401773108, now seen corresponding path program 6 times [2021-07-13 20:01:51,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:51,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282431861] [2021-07-13 20:01:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:51,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:51,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282431861] [2021-07-13 20:01:51,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282431861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:51,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304831819] [2021-07-13 20:01:51,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:51,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:01:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:01:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:51,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:51,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 20:01:51,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:51,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:51,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:01:51,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:177 [2021-07-13 20:01:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:52,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304831819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:52,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:52,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-07-13 20:01:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20314065] [2021-07-13 20:01:52,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:01:52,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:01:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:01:52,092 INFO L87 Difference]: Start difference. First operand 9406 states and 42469 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:54,248 INFO L93 Difference]: Finished difference Result 11554 states and 51382 transitions. [2021-07-13 20:01:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:01:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:54,282 INFO L225 Difference]: With dead ends: 11554 [2021-07-13 20:01:54,282 INFO L226 Difference]: Without dead ends: 11326 [2021-07-13 20:01:54,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1193.7ms TimeCoverageRelationStatistics Valid=319, Invalid=2873, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:01:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2021-07-13 20:01:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 9470. [2021-07-13 20:01:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9470 states, 9469 states have (on average 4.523603337205619) internal successors, (42834), 9469 states have internal predecessors, (42834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9470 states to 9470 states and 42834 transitions. [2021-07-13 20:01:54,518 INFO L78 Accepts]: Start accepts. Automaton has 9470 states and 42834 transitions. Word has length 30 [2021-07-13 20:01:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:54,518 INFO L482 AbstractCegarLoop]: Abstraction has 9470 states and 42834 transitions. [2021-07-13 20:01:54,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 9470 states and 42834 transitions. [2021-07-13 20:01:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:54,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:54,538 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:54,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-07-13 20:01:54,738 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1927988576, now seen corresponding path program 68 times [2021-07-13 20:01:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:54,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340306247] [2021-07-13 20:01:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:54,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340306247] [2021-07-13 20:01:54,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340306247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:54,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513967643] [2021-07-13 20:01:54,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:54,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:01:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:55,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:01:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:01:55,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:55,199 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 20:01:55,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:55,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 20:01:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:55,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513967643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:55,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:55,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:01:55,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191859272] [2021-07-13 20:01:55,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:55,309 INFO L87 Difference]: Start difference. First operand 9470 states and 42834 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:56,483 INFO L93 Difference]: Finished difference Result 10017 states and 44899 transitions. [2021-07-13 20:01:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:01:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:56,511 INFO L225 Difference]: With dead ends: 10017 [2021-07-13 20:01:56,511 INFO L226 Difference]: Without dead ends: 9877 [2021-07-13 20:01:56,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:01:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9877 states. [2021-07-13 20:01:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9877 to 9475. [2021-07-13 20:01:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9475 states, 9474 states have (on average 4.522799240025332) internal successors, (42849), 9474 states have internal predecessors, (42849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 42849 transitions. [2021-07-13 20:01:56,712 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 42849 transitions. Word has length 30 [2021-07-13 20:01:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:56,712 INFO L482 AbstractCegarLoop]: Abstraction has 9475 states and 42849 transitions. [2021-07-13 20:01:56,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 42849 transitions. [2021-07-13 20:01:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:01:56,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:56,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:56,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:56,932 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1662609756, now seen corresponding path program 69 times [2021-07-13 20:01:56,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:56,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510979353] [2021-07-13 20:01:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:57,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510979353] [2021-07-13 20:01:57,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510979353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480117964] [2021-07-13 20:01:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:57,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:01:57,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:01:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:57,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:01:57,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:57,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:01:57,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:01:57,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:01:57,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:01:57,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-07-13 20:01:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:57,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480117964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:57,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:57,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:01:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464170328] [2021-07-13 20:01:57,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:01:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:57,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:01:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:01:57,609 INFO L87 Difference]: Start difference. First operand 9475 states and 42849 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:59,699 INFO L93 Difference]: Finished difference Result 10043 states and 44948 transitions. [2021-07-13 20:01:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:01:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:01:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:59,726 INFO L225 Difference]: With dead ends: 10043 [2021-07-13 20:01:59,726 INFO L226 Difference]: Without dead ends: 9880 [2021-07-13 20:01:59,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1572.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:01:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2021-07-13 20:01:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9484. [2021-07-13 20:01:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9484 states, 9483 states have (on average 4.522619424232838) internal successors, (42888), 9483 states have internal predecessors, (42888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9484 states to 9484 states and 42888 transitions. [2021-07-13 20:01:59,994 INFO L78 Accepts]: Start accepts. Automaton has 9484 states and 42888 transitions. Word has length 30 [2021-07-13 20:01:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:59,994 INFO L482 AbstractCegarLoop]: Abstraction has 9484 states and 42888 transitions. [2021-07-13 20:01:59,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9484 states and 42888 transitions. [2021-07-13 20:02:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:00,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:00,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:00,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-13 20:02:00,213 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2099600558, now seen corresponding path program 70 times [2021-07-13 20:02:00,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:00,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037929865] [2021-07-13 20:02:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:00,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037929865] [2021-07-13 20:02:00,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037929865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:00,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002128670] [2021-07-13 20:02:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:00,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:00,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:00,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:00,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:00,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:00,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:00,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:00,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002128670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:00,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:00,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-07-13 20:02:00,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934331462] [2021-07-13 20:02:00,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:02:00,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:02:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:02:00,648 INFO L87 Difference]: Start difference. First operand 9484 states and 42888 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:01,639 INFO L93 Difference]: Finished difference Result 9980 states and 44784 transitions. [2021-07-13 20:02:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:02:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:01,667 INFO L225 Difference]: With dead ends: 9980 [2021-07-13 20:02:01,667 INFO L226 Difference]: Without dead ends: 9868 [2021-07-13 20:02:01,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:02:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-07-13 20:02:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9490. [2021-07-13 20:02:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9490 states, 9489 states have (on average 4.522183580988513) internal successors, (42911), 9489 states have internal predecessors, (42911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9490 states to 9490 states and 42911 transitions. [2021-07-13 20:02:01,873 INFO L78 Accepts]: Start accepts. Automaton has 9490 states and 42911 transitions. Word has length 30 [2021-07-13 20:02:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:01,873 INFO L482 AbstractCegarLoop]: Abstraction has 9490 states and 42911 transitions. [2021-07-13 20:02:01,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 9490 states and 42911 transitions. [2021-07-13 20:02:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:01,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:01,893 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:02,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-07-13 20:02:02,093 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:02,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1581275744, now seen corresponding path program 7 times [2021-07-13 20:02:02,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:02,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397814392] [2021-07-13 20:02:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:02,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397814392] [2021-07-13 20:02:02,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397814392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584125947] [2021-07-13 20:02:02,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:02,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:02,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:02,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:02,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:02,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:02,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:02,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:02,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584125947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:02,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:02,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 20:02:02,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434046543] [2021-07-13 20:02:02,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:02:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:02:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:02:02,504 INFO L87 Difference]: Start difference. First operand 9490 states and 42911 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:03,086 INFO L93 Difference]: Finished difference Result 9988 states and 44749 transitions. [2021-07-13 20:02:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:02:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:03,119 INFO L225 Difference]: With dead ends: 9988 [2021-07-13 20:02:03,119 INFO L226 Difference]: Without dead ends: 9787 [2021-07-13 20:02:03,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:02:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9787 states. [2021-07-13 20:02:03,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9787 to 9501. [2021-07-13 20:02:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9501 states, 9500 states have (on average 4.52178947368421) internal successors, (42957), 9500 states have internal predecessors, (42957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9501 states to 9501 states and 42957 transitions. [2021-07-13 20:02:03,338 INFO L78 Accepts]: Start accepts. Automaton has 9501 states and 42957 transitions. Word has length 30 [2021-07-13 20:02:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 9501 states and 42957 transitions. [2021-07-13 20:02:03,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 9501 states and 42957 transitions. [2021-07-13 20:02:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:03,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:03,357 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:03,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-07-13 20:02:03,558 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1667325488, now seen corresponding path program 66 times [2021-07-13 20:02:03,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:03,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177032820] [2021-07-13 20:02:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:03,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177032820] [2021-07-13 20:02:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177032820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69933065] [2021-07-13 20:02:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:03,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:02:03,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:03,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:03,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:03,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:03,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:03,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:03,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:03,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:03,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69933065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:03,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:03,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:02:03,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136503660] [2021-07-13 20:02:03,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:02:03,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:03,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:02:03,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:02:03,946 INFO L87 Difference]: Start difference. First operand 9501 states and 42957 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:04,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:04,785 INFO L93 Difference]: Finished difference Result 9890 states and 44449 transitions. [2021-07-13 20:02:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:02:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:04,812 INFO L225 Difference]: With dead ends: 9890 [2021-07-13 20:02:04,812 INFO L226 Difference]: Without dead ends: 9792 [2021-07-13 20:02:04,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:02:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-07-13 20:02:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 9513. [2021-07-13 20:02:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9513 states, 9512 states have (on average 4.521131202691337) internal successors, (43005), 9512 states have internal predecessors, (43005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 43005 transitions. [2021-07-13 20:02:05,089 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 43005 transitions. Word has length 30 [2021-07-13 20:02:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:05,090 INFO L482 AbstractCegarLoop]: Abstraction has 9513 states and 43005 transitions. [2021-07-13 20:02:05,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 43005 transitions. [2021-07-13 20:02:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:05,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:05,109 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:05,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-07-13 20:02:05,310 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2007157742, now seen corresponding path program 67 times [2021-07-13 20:02:05,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:05,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229324266] [2021-07-13 20:02:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:05,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229324266] [2021-07-13 20:02:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229324266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769622911] [2021-07-13 20:02:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:05,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:05,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:05,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:05,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:05,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:05,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:05,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:05,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769622911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:05,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:05,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:02:05,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510423866] [2021-07-13 20:02:05,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:02:05,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:02:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:02:05,679 INFO L87 Difference]: Start difference. First operand 9513 states and 43005 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:06,376 INFO L93 Difference]: Finished difference Result 9862 states and 44321 transitions. [2021-07-13 20:02:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:02:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:06,403 INFO L225 Difference]: With dead ends: 9862 [2021-07-13 20:02:06,403 INFO L226 Difference]: Without dead ends: 9770 [2021-07-13 20:02:06,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:02:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9770 states. [2021-07-13 20:02:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9770 to 9507. [2021-07-13 20:02:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9507 states, 9506 states have (on average 4.521039343572481) internal successors, (42977), 9506 states have internal predecessors, (42977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9507 states to 9507 states and 42977 transitions. [2021-07-13 20:02:06,605 INFO L78 Accepts]: Start accepts. Automaton has 9507 states and 42977 transitions. Word has length 30 [2021-07-13 20:02:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:06,605 INFO L482 AbstractCegarLoop]: Abstraction has 9507 states and 42977 transitions. [2021-07-13 20:02:06,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9507 states and 42977 transitions. [2021-07-13 20:02:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:06,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:06,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:06,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-07-13 20:02:06,826 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:06,826 INFO L82 PathProgramCache]: Analyzing trace with hash 353883056, now seen corresponding path program 68 times [2021-07-13 20:02:06,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:06,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038464708] [2021-07-13 20:02:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:07,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:07,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038464708] [2021-07-13 20:02:07,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038464708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:07,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107830164] [2021-07-13 20:02:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:07,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:02:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:07,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:07,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:07,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:02:07,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:07,298 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 20:02:07,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:07,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 20:02:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:07,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107830164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:07,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:07,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:02:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602819478] [2021-07-13 20:02:07,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:07,338 INFO L87 Difference]: Start difference. First operand 9507 states and 42977 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:08,476 INFO L93 Difference]: Finished difference Result 10123 states and 45333 transitions. [2021-07-13 20:02:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:02:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:08,504 INFO L225 Difference]: With dead ends: 10123 [2021-07-13 20:02:08,504 INFO L226 Difference]: Without dead ends: 10009 [2021-07-13 20:02:08,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 764.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:02:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-07-13 20:02:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9506. [2021-07-13 20:02:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9506 states, 9505 states have (on average 4.521199368753288) internal successors, (42974), 9505 states have internal predecessors, (42974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9506 states to 9506 states and 42974 transitions. [2021-07-13 20:02:08,702 INFO L78 Accepts]: Start accepts. Automaton has 9506 states and 42974 transitions. Word has length 30 [2021-07-13 20:02:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:08,702 INFO L482 AbstractCegarLoop]: Abstraction has 9506 states and 42974 transitions. [2021-07-13 20:02:08,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 9506 states and 42974 transitions. [2021-07-13 20:02:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:08,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:08,721 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:08,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:08,921 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1932960114, now seen corresponding path program 71 times [2021-07-13 20:02:08,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:08,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985243089] [2021-07-13 20:02:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:09,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:09,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985243089] [2021-07-13 20:02:09,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985243089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:09,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096280826] [2021-07-13 20:02:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:09,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:02:09,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:09,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:09,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-07-13 20:02:09,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:09,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:09,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:09,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-07-13 20:02:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:09,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096280826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:09,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:09,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:02:09,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958889277] [2021-07-13 20:02:09,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:09,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:09,361 INFO L87 Difference]: Start difference. First operand 9506 states and 42974 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:10,902 INFO L93 Difference]: Finished difference Result 10440 states and 46653 transitions. [2021-07-13 20:02:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:02:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:10,931 INFO L225 Difference]: With dead ends: 10440 [2021-07-13 20:02:10,931 INFO L226 Difference]: Without dead ends: 10335 [2021-07-13 20:02:10,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:02:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10335 states. [2021-07-13 20:02:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10335 to 9514. [2021-07-13 20:02:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9514 states, 9513 states have (on average 4.520971302428256) internal successors, (43008), 9513 states have internal predecessors, (43008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 43008 transitions. [2021-07-13 20:02:11,144 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 43008 transitions. Word has length 30 [2021-07-13 20:02:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:11,144 INFO L482 AbstractCegarLoop]: Abstraction has 9514 states and 43008 transitions. [2021-07-13 20:02:11,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 43008 transitions. [2021-07-13 20:02:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:11,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:11,163 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:11,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-13 20:02:11,363 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:11,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2117953772, now seen corresponding path program 69 times [2021-07-13 20:02:11,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:11,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348181965] [2021-07-13 20:02:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:11,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:11,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348181965] [2021-07-13 20:02:11,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348181965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:11,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380718080] [2021-07-13 20:02:11,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:11,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:02:11,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:11,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:11,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-13 20:02:11,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:11,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:11,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:11,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-13 20:02:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380718080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:11,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:11,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 20:02:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144279537] [2021-07-13 20:02:11,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:02:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:02:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:02:11,783 INFO L87 Difference]: Start difference. First operand 9514 states and 43008 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:13,258 INFO L93 Difference]: Finished difference Result 11453 states and 50137 transitions. [2021-07-13 20:02:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:02:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:13,290 INFO L225 Difference]: With dead ends: 11453 [2021-07-13 20:02:13,290 INFO L226 Difference]: Without dead ends: 11329 [2021-07-13 20:02:13,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 896.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1714, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:02:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11329 states. [2021-07-13 20:02:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11329 to 9528. [2021-07-13 20:02:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 4.520520625590427) internal successors, (43067), 9527 states have internal predecessors, (43067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 43067 transitions. [2021-07-13 20:02:13,582 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 43067 transitions. Word has length 30 [2021-07-13 20:02:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:13,582 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 43067 transitions. [2021-07-13 20:02:13,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 43067 transitions. [2021-07-13 20:02:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:13,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:13,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:13,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:13,802 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1068030562, now seen corresponding path program 72 times [2021-07-13 20:02:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:13,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272543878] [2021-07-13 20:02:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:13,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:13,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272543878] [2021-07-13 20:02:13,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272543878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:13,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850820399] [2021-07-13 20:02:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:14,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:02:14,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:02:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:14,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:14,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:14,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-07-13 20:02:14,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:02:14,304 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:02:14,304 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-07-13 20:02:14,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:14,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:79 [2021-07-13 20:02:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:14,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850820399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:14,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:14,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:02:14,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358004465] [2021-07-13 20:02:14,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:14,548 INFO L87 Difference]: Start difference. First operand 9528 states and 43067 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:15,198 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-13 20:02:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:17,795 INFO L93 Difference]: Finished difference Result 10719 states and 47595 transitions. [2021-07-13 20:02:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:02:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:17,825 INFO L225 Difference]: With dead ends: 10719 [2021-07-13 20:02:17,826 INFO L226 Difference]: Without dead ends: 10495 [2021-07-13 20:02:17,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2412.2ms TimeCoverageRelationStatistics Valid=372, Invalid=3660, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:02:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-07-13 20:02:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9524. [2021-07-13 20:02:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 4.520634253911583) internal successors, (43050), 9523 states have internal predecessors, (43050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 43050 transitions. [2021-07-13 20:02:18,037 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 43050 transitions. Word has length 30 [2021-07-13 20:02:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:18,037 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 43050 transitions. [2021-07-13 20:02:18,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 43050 transitions. [2021-07-13 20:02:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:18,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:18,057 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:18,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-07-13 20:02:18,257 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1222272674, now seen corresponding path program 73 times [2021-07-13 20:02:18,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:18,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678701979] [2021-07-13 20:02:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:18,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678701979] [2021-07-13 20:02:18,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678701979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043077372] [2021-07-13 20:02:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:18,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:18,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:18,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:18,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:18,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:18,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:18,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:18,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043077372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:18,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:18,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:02:18,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544555424] [2021-07-13 20:02:18,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:02:18,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:18,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:02:18,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:02:18,647 INFO L87 Difference]: Start difference. First operand 9524 states and 43050 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:19,588 INFO L93 Difference]: Finished difference Result 10196 states and 45651 transitions. [2021-07-13 20:02:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:02:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:19,615 INFO L225 Difference]: With dead ends: 10196 [2021-07-13 20:02:19,615 INFO L226 Difference]: Without dead ends: 10091 [2021-07-13 20:02:19,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 643.4ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:02:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10091 states. [2021-07-13 20:02:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10091 to 9529. [2021-07-13 20:02:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9529 states, 9528 states have (on average 4.520465994962216) internal successors, (43071), 9528 states have internal predecessors, (43071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9529 states to 9529 states and 43071 transitions. [2021-07-13 20:02:19,852 INFO L78 Accepts]: Start accepts. Automaton has 9529 states and 43071 transitions. Word has length 30 [2021-07-13 20:02:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:19,852 INFO L482 AbstractCegarLoop]: Abstraction has 9529 states and 43071 transitions. [2021-07-13 20:02:19,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9529 states and 43071 transitions. [2021-07-13 20:02:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:19,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:19,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:20,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-07-13 20:02:20,071 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:20,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1460216054, now seen corresponding path program 74 times [2021-07-13 20:02:20,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:20,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952749691] [2021-07-13 20:02:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:20,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:20,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952749691] [2021-07-13 20:02:20,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952749691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554953118] [2021-07-13 20:02:20,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:20,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:02:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:20,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:20,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:02:20,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:20,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:20,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:20,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-13 20:02:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:20,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554953118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:20,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:20,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:02:20,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938137688] [2021-07-13 20:02:20,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:20,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:20,598 INFO L87 Difference]: Start difference. First operand 9529 states and 43071 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:22,479 INFO L93 Difference]: Finished difference Result 10251 states and 45785 transitions. [2021-07-13 20:02:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:02:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:22,507 INFO L225 Difference]: With dead ends: 10251 [2021-07-13 20:02:22,507 INFO L226 Difference]: Without dead ends: 10099 [2021-07-13 20:02:22,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1376.9ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:02:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2021-07-13 20:02:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 9526. [2021-07-13 20:02:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9525 states have (on average 4.52) internal successors, (43053), 9525 states have internal predecessors, (43053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 43053 transitions. [2021-07-13 20:02:22,741 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 43053 transitions. Word has length 30 [2021-07-13 20:02:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:22,741 INFO L482 AbstractCegarLoop]: Abstraction has 9526 states and 43053 transitions. [2021-07-13 20:02:22,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 43053 transitions. [2021-07-13 20:02:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:22,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:22,759 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:22,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-07-13 20:02:22,960 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 603104802, now seen corresponding path program 70 times [2021-07-13 20:02:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:22,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832829010] [2021-07-13 20:02:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:23,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832829010] [2021-07-13 20:02:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832829010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519175206] [2021-07-13 20:02:23,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:23,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:23,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:23,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:23,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:23,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:23,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:23,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:23,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:23,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519175206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:23,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:23,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:02:23,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750689004] [2021-07-13 20:02:23,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:02:23,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:23,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:02:23,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:02:23,324 INFO L87 Difference]: Start difference. First operand 9526 states and 43053 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:24,836 INFO L93 Difference]: Finished difference Result 11829 states and 52009 transitions. [2021-07-13 20:02:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:02:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:24,869 INFO L225 Difference]: With dead ends: 11829 [2021-07-13 20:02:24,870 INFO L226 Difference]: Without dead ends: 11729 [2021-07-13 20:02:24,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:02:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11729 states. [2021-07-13 20:02:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11729 to 9560. [2021-07-13 20:02:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 4.520974997384664) internal successors, (43216), 9559 states have internal predecessors, (43216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 43216 transitions. [2021-07-13 20:02:25,179 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 43216 transitions. Word has length 30 [2021-07-13 20:02:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:25,179 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 43216 transitions. [2021-07-13 20:02:25,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 43216 transitions. [2021-07-13 20:02:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:25,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:25,197 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:25,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:25,398 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1925833962, now seen corresponding path program 71 times [2021-07-13 20:02:25,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:25,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488538273] [2021-07-13 20:02:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:25,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:25,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488538273] [2021-07-13 20:02:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488538273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:25,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862486689] [2021-07-13 20:02:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:25,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:02:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:25,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:25,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:25,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:25,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:25,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:25,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:25,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:25,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:25,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862486689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:25,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:25,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:02:25,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115410275] [2021-07-13 20:02:25,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:02:25,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:25,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:02:25,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:02:25,765 INFO L87 Difference]: Start difference. First operand 9560 states and 43216 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:27,494 INFO L93 Difference]: Finished difference Result 12084 states and 52842 transitions. [2021-07-13 20:02:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:02:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:27,528 INFO L225 Difference]: With dead ends: 12084 [2021-07-13 20:02:27,528 INFO L226 Difference]: Without dead ends: 11991 [2021-07-13 20:02:27,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 948.4ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:02:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11991 states. [2021-07-13 20:02:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11991 to 9560. [2021-07-13 20:02:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 4.519719635945182) internal successors, (43204), 9559 states have internal predecessors, (43204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 43204 transitions. [2021-07-13 20:02:27,764 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 43204 transitions. Word has length 30 [2021-07-13 20:02:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:27,764 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 43204 transitions. [2021-07-13 20:02:27,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 43204 transitions. [2021-07-13 20:02:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:27,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:27,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:28,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-13 20:02:28,053 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash -726234836, now seen corresponding path program 31 times [2021-07-13 20:02:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:28,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566271938] [2021-07-13 20:02:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:28,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:28,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566271938] [2021-07-13 20:02:28,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566271938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:28,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050994372] [2021-07-13 20:02:28,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:28,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:28,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:28,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:28,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:28,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:28,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:28,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:28,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:28,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050994372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:28,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:28,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:02:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763188082] [2021-07-13 20:02:28,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:02:28,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:28,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:02:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:02:28,517 INFO L87 Difference]: Start difference. First operand 9560 states and 43204 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:30,015 INFO L93 Difference]: Finished difference Result 10174 states and 45585 transitions. [2021-07-13 20:02:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:02:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:30,043 INFO L225 Difference]: With dead ends: 10174 [2021-07-13 20:02:30,043 INFO L226 Difference]: Without dead ends: 10060 [2021-07-13 20:02:30,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1170.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:02:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10060 states. [2021-07-13 20:02:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10060 to 9578. [2021-07-13 20:02:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9578 states, 9577 states have (on average 4.51905607183878) internal successors, (43279), 9577 states have internal predecessors, (43279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9578 states to 9578 states and 43279 transitions. [2021-07-13 20:02:30,234 INFO L78 Accepts]: Start accepts. Automaton has 9578 states and 43279 transitions. Word has length 30 [2021-07-13 20:02:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:30,234 INFO L482 AbstractCegarLoop]: Abstraction has 9578 states and 43279 transitions. [2021-07-13 20:02:30,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9578 states and 43279 transitions. [2021-07-13 20:02:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:30,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:30,252 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:30,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-07-13 20:02:30,453 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1039761232, now seen corresponding path program 32 times [2021-07-13 20:02:30,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:30,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775568303] [2021-07-13 20:02:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:30,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775568303] [2021-07-13 20:02:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775568303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502232543] [2021-07-13 20:02:30,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:30,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:30,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:02:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:30,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:30,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:02:30,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:30,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:30,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:30,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-07-13 20:02:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:31,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502232543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:31,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:31,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:02:31,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774043611] [2021-07-13 20:02:31,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:31,015 INFO L87 Difference]: Start difference. First operand 9578 states and 43279 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:33,235 INFO L93 Difference]: Finished difference Result 10486 states and 46614 transitions. [2021-07-13 20:02:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:02:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:33,267 INFO L225 Difference]: With dead ends: 10486 [2021-07-13 20:02:33,268 INFO L226 Difference]: Without dead ends: 10163 [2021-07-13 20:02:33,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1768.4ms TimeCoverageRelationStatistics Valid=438, Invalid=2424, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:02:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-07-13 20:02:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 9591. [2021-07-13 20:02:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9591 states, 9590 states have (on average 4.518456725755996) internal successors, (43332), 9590 states have internal predecessors, (43332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9591 states to 9591 states and 43332 transitions. [2021-07-13 20:02:33,466 INFO L78 Accepts]: Start accepts. Automaton has 9591 states and 43332 transitions. Word has length 30 [2021-07-13 20:02:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:33,466 INFO L482 AbstractCegarLoop]: Abstraction has 9591 states and 43332 transitions. [2021-07-13 20:02:33,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 9591 states and 43332 transitions. [2021-07-13 20:02:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:33,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:33,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:33,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-07-13 20:02:33,686 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1146174864, now seen corresponding path program 75 times [2021-07-13 20:02:33,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:33,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101600467] [2021-07-13 20:02:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:33,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101600467] [2021-07-13 20:02:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101600467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798294353] [2021-07-13 20:02:33,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:33,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:02:33,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:33,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:33,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:34,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:34,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:34,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 20:02:34,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:34,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:34,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:34,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-07-13 20:02:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:34,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798294353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:34,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:34,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:34,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12006780] [2021-07-13 20:02:34,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:34,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:34,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:34,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:34,125 INFO L87 Difference]: Start difference. First operand 9591 states and 43332 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:35,276 INFO L93 Difference]: Finished difference Result 10170 states and 45540 transitions. [2021-07-13 20:02:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:02:35,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:35,302 INFO L225 Difference]: With dead ends: 10170 [2021-07-13 20:02:35,302 INFO L226 Difference]: Without dead ends: 10039 [2021-07-13 20:02:35,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:02:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10039 states. [2021-07-13 20:02:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10039 to 9591. [2021-07-13 20:02:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9591 states, 9590 states have (on average 4.518039624608968) internal successors, (43328), 9590 states have internal predecessors, (43328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9591 states to 9591 states and 43328 transitions. [2021-07-13 20:02:35,485 INFO L78 Accepts]: Start accepts. Automaton has 9591 states and 43328 transitions. Word has length 30 [2021-07-13 20:02:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:35,485 INFO L482 AbstractCegarLoop]: Abstraction has 9591 states and 43328 transitions. [2021-07-13 20:02:35,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9591 states and 43328 transitions. [2021-07-13 20:02:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:35,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:35,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:35,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:35,704 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash -441805900, now seen corresponding path program 76 times [2021-07-13 20:02:35,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:35,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160192939] [2021-07-13 20:02:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:35,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160192939] [2021-07-13 20:02:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160192939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:35,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478836851] [2021-07-13 20:02:35,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:35,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:35,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:36,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:36,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:36,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:36,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:36,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:36,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478836851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:36,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:36,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 20:02:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733915829] [2021-07-13 20:02:36,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:02:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:02:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:02:36,162 INFO L87 Difference]: Start difference. First operand 9591 states and 43328 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:37,341 INFO L93 Difference]: Finished difference Result 10094 states and 45231 transitions. [2021-07-13 20:02:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:02:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:37,369 INFO L225 Difference]: With dead ends: 10094 [2021-07-13 20:02:37,369 INFO L226 Difference]: Without dead ends: 9979 [2021-07-13 20:02:37,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 870.1ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:02:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9979 states. [2021-07-13 20:02:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9979 to 9595. [2021-07-13 20:02:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 4.517927871586408) internal successors, (43345), 9594 states have internal predecessors, (43345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 43345 transitions. [2021-07-13 20:02:37,563 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 43345 transitions. Word has length 30 [2021-07-13 20:02:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:37,563 INFO L482 AbstractCegarLoop]: Abstraction has 9595 states and 43345 transitions. [2021-07-13 20:02:37,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 43345 transitions. [2021-07-13 20:02:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:37,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:37,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:37,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:37,793 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash -974562882, now seen corresponding path program 77 times [2021-07-13 20:02:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:37,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612998858] [2021-07-13 20:02:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:38,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:38,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612998858] [2021-07-13 20:02:38,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612998858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:38,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496230961] [2021-07-13 20:02:38,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:38,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:02:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:38,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:38,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:38,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:02:38,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:38,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:38,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:38,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-07-13 20:02:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496230961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:38,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:38,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:02:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851710789] [2021-07-13 20:02:38,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:38,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:38,301 INFO L87 Difference]: Start difference. First operand 9595 states and 43345 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:39,668 INFO L93 Difference]: Finished difference Result 9894 states and 44428 transitions. [2021-07-13 20:02:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:02:39,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:39,695 INFO L225 Difference]: With dead ends: 9894 [2021-07-13 20:02:39,695 INFO L226 Difference]: Without dead ends: 9835 [2021-07-13 20:02:39,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 869.6ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:02:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-07-13 20:02:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9595. [2021-07-13 20:02:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 4.51782363977486) internal successors, (43344), 9594 states have internal predecessors, (43344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 43344 transitions. [2021-07-13 20:02:39,887 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 43344 transitions. Word has length 30 [2021-07-13 20:02:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:39,887 INFO L482 AbstractCegarLoop]: Abstraction has 9595 states and 43344 transitions. [2021-07-13 20:02:39,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 43344 transitions. [2021-07-13 20:02:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:39,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:39,905 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:40,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:40,117 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1704808642, now seen corresponding path program 78 times [2021-07-13 20:02:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:40,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83395118] [2021-07-13 20:02:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:40,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:40,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83395118] [2021-07-13 20:02:40,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83395118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:40,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769013443] [2021-07-13 20:02:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:40,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:02:40,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:02:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:40,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:40,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:02:40,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:40,588 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.2 percent of original size [2021-07-13 20:02:40,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:40,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:469 [2021-07-13 20:02:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769013443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:40,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:40,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:02:40,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775861267] [2021-07-13 20:02:40,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:02:40,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:40,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:02:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:40,958 INFO L87 Difference]: Start difference. First operand 9595 states and 43344 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:42,271 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-13 20:02:42,447 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-13 20:02:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:43,282 INFO L93 Difference]: Finished difference Result 10637 states and 47291 transitions. [2021-07-13 20:02:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:02:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:43,311 INFO L225 Difference]: With dead ends: 10637 [2021-07-13 20:02:43,311 INFO L226 Difference]: Without dead ends: 10514 [2021-07-13 20:02:43,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1794.4ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:02:43,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-07-13 20:02:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 9632. [2021-07-13 20:02:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 4.511577198629426) internal successors, (43451), 9631 states have internal predecessors, (43451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 43451 transitions. [2021-07-13 20:02:43,515 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 43451 transitions. Word has length 30 [2021-07-13 20:02:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:43,516 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 43451 transitions. [2021-07-13 20:02:43,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 43451 transitions. [2021-07-13 20:02:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:43,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:43,534 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:43,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-07-13 20:02:43,750 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 211398642, now seen corresponding path program 79 times [2021-07-13 20:02:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:43,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954303030] [2021-07-13 20:02:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:43,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:43,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954303030] [2021-07-13 20:02:43,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954303030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:43,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387125307] [2021-07-13 20:02:43,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:44,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:44,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:44,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:44,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:44,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:02:44,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:44,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:02:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:44,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387125307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:44,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:44,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:02:44,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447169219] [2021-07-13 20:02:44,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:02:44,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:02:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:02:44,239 INFO L87 Difference]: Start difference. First operand 9632 states and 43451 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:45,433 INFO L93 Difference]: Finished difference Result 10132 states and 45350 transitions. [2021-07-13 20:02:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:02:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:45,461 INFO L225 Difference]: With dead ends: 10132 [2021-07-13 20:02:45,461 INFO L226 Difference]: Without dead ends: 9982 [2021-07-13 20:02:45,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 925.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:02:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9982 states. [2021-07-13 20:02:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9982 to 9595. [2021-07-13 20:02:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 9594 states have (on average 4.517406712528664) internal successors, (43340), 9594 states have internal predecessors, (43340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 43340 transitions. [2021-07-13 20:02:45,733 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 43340 transitions. Word has length 30 [2021-07-13 20:02:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:45,733 INFO L482 AbstractCegarLoop]: Abstraction has 9595 states and 43340 transitions. [2021-07-13 20:02:45,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 43340 transitions. [2021-07-13 20:02:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:45,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:45,750 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:45,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:45,951 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:45,951 INFO L82 PathProgramCache]: Analyzing trace with hash 740206354, now seen corresponding path program 33 times [2021-07-13 20:02:45,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:45,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601278883] [2021-07-13 20:02:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:46,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:46,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601278883] [2021-07-13 20:02:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601278883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:46,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632938392] [2021-07-13 20:02:46,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:46,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:02:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:02:46,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:46,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-07-13 20:02:46,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:02:46,384 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-07-13 20:02:46,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:02:46,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-07-13 20:02:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:46,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632938392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:46,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:46,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:02:46,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125285288] [2021-07-13 20:02:46,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:46,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:46,527 INFO L87 Difference]: Start difference. First operand 9595 states and 43340 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:48,522 INFO L93 Difference]: Finished difference Result 10624 states and 47167 transitions. [2021-07-13 20:02:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:02:48,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:48,550 INFO L225 Difference]: With dead ends: 10624 [2021-07-13 20:02:48,550 INFO L226 Difference]: Without dead ends: 10342 [2021-07-13 20:02:48,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1453.8ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:02:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2021-07-13 20:02:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 9614. [2021-07-13 20:02:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 4.516800166441278) internal successors, (43420), 9613 states have internal predecessors, (43420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 43420 transitions. [2021-07-13 20:02:48,749 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 43420 transitions. Word has length 30 [2021-07-13 20:02:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:48,749 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 43420 transitions. [2021-07-13 20:02:48,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 43420 transitions. [2021-07-13 20:02:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:48,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:48,767 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:48,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:48,968 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash -824776834, now seen corresponding path program 80 times [2021-07-13 20:02:48,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:48,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62114832] [2021-07-13 20:02:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:49,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:49,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62114832] [2021-07-13 20:02:49,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62114832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:49,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845878580] [2021-07-13 20:02:49,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:49,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:49,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:02:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:49,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:49,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:49,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:02:49,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:49,504 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 20:02:49,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:49,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 20:02:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:49,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845878580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:49,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:49,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:02:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784643731] [2021-07-13 20:02:49,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:49,548 INFO L87 Difference]: Start difference. First operand 9614 states and 43420 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:50,661 INFO L93 Difference]: Finished difference Result 10163 states and 45472 transitions. [2021-07-13 20:02:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:02:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:50,688 INFO L225 Difference]: With dead ends: 10163 [2021-07-13 20:02:50,688 INFO L226 Difference]: Without dead ends: 10016 [2021-07-13 20:02:50,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:02:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-07-13 20:02:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 9614. [2021-07-13 20:02:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 4.5156558826588995) internal successors, (43409), 9613 states have internal predecessors, (43409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 43409 transitions. [2021-07-13 20:02:50,882 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 43409 transitions. Word has length 30 [2021-07-13 20:02:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:50,882 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 43409 transitions. [2021-07-13 20:02:50,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 43409 transitions. [2021-07-13 20:02:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:50,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:50,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:51,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:51,101 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1020757778, now seen corresponding path program 81 times [2021-07-13 20:02:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:51,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606559189] [2021-07-13 20:02:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:51,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:51,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606559189] [2021-07-13 20:02:51,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606559189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:51,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617134833] [2021-07-13 20:02:51,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:51,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:02:51,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:51,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:51,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:51,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:51,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:51,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 20:02:51,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:51,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:51,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:51,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 20:02:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:51,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617134833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:51,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:51,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:51,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878451266] [2021-07-13 20:02:51,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:51,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:51,520 INFO L87 Difference]: Start difference. First operand 9614 states and 43409 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:52,947 INFO L93 Difference]: Finished difference Result 10720 states and 47708 transitions. [2021-07-13 20:02:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:02:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:52,975 INFO L225 Difference]: With dead ends: 10720 [2021-07-13 20:02:52,975 INFO L226 Difference]: Without dead ends: 10587 [2021-07-13 20:02:52,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:02:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2021-07-13 20:02:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 9624. [2021-07-13 20:02:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9624 states, 9623 states have (on average 4.514080847968409) internal successors, (43439), 9623 states have internal predecessors, (43439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9624 states to 9624 states and 43439 transitions. [2021-07-13 20:02:53,178 INFO L78 Accepts]: Start accepts. Automaton has 9624 states and 43439 transitions. Word has length 30 [2021-07-13 20:02:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:53,178 INFO L482 AbstractCegarLoop]: Abstraction has 9624 states and 43439 transitions. [2021-07-13 20:02:53,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9624 states and 43439 transitions. [2021-07-13 20:02:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:53,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:53,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:53,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:53,398 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:53,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1527104044, now seen corresponding path program 82 times [2021-07-13 20:02:53,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:53,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855110961] [2021-07-13 20:02:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:53,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:53,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855110961] [2021-07-13 20:02:53,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855110961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:53,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797799708] [2021-07-13 20:02:53,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:53,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:53,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:53,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:53,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 20:02:53,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:53,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:53,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:53,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 20:02:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:53,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797799708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:53,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:53,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:02:53,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728198751] [2021-07-13 20:02:53,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:02:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:02:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:02:53,849 INFO L87 Difference]: Start difference. First operand 9624 states and 43439 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:54,891 INFO L93 Difference]: Finished difference Result 10225 states and 45732 transitions. [2021-07-13 20:02:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:02:54,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:54,919 INFO L225 Difference]: With dead ends: 10225 [2021-07-13 20:02:54,919 INFO L226 Difference]: Without dead ends: 10070 [2021-07-13 20:02:54,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:02:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10070 states. [2021-07-13 20:02:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10070 to 9616. [2021-07-13 20:02:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9616 states, 9615 states have (on average 4.515028601144046) internal successors, (43412), 9615 states have internal predecessors, (43412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 43412 transitions. [2021-07-13 20:02:55,121 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 43412 transitions. Word has length 30 [2021-07-13 20:02:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:55,121 INFO L482 AbstractCegarLoop]: Abstraction has 9616 states and 43412 transitions. [2021-07-13 20:02:55,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 43412 transitions. [2021-07-13 20:02:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:55,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:55,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:55,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-07-13 20:02:55,341 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 423059838, now seen corresponding path program 83 times [2021-07-13 20:02:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:55,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883691021] [2021-07-13 20:02:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:55,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:55,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883691021] [2021-07-13 20:02:55,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883691021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103535403] [2021-07-13 20:02:55,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:55,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:02:55,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:02:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:55,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:02:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:02:55,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:55,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:55,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:55,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-07-13 20:02:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:55,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103535403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:55,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:02:55,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066272674] [2021-07-13 20:02:55,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:02:55,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:02:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:02:55,805 INFO L87 Difference]: Start difference. First operand 9616 states and 43412 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:57,323 INFO L93 Difference]: Finished difference Result 9794 states and 44017 transitions. [2021-07-13 20:02:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:02:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:02:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:57,350 INFO L225 Difference]: With dead ends: 9794 [2021-07-13 20:02:57,350 INFO L226 Difference]: Without dead ends: 9739 [2021-07-13 20:02:57,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1131.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:02:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2021-07-13 20:02:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9618. [2021-07-13 20:02:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9618 states, 9617 states have (on average 4.51460954559634) internal successors, (43417), 9617 states have internal predecessors, (43417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9618 states to 9618 states and 43417 transitions. [2021-07-13 20:02:57,547 INFO L78 Accepts]: Start accepts. Automaton has 9618 states and 43417 transitions. Word has length 30 [2021-07-13 20:02:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:57,548 INFO L482 AbstractCegarLoop]: Abstraction has 9618 states and 43417 transitions. [2021-07-13 20:02:57,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 9618 states and 43417 transitions. [2021-07-13 20:02:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:02:57,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:57,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:57,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-07-13 20:02:57,767 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash -972527238, now seen corresponding path program 84 times [2021-07-13 20:02:57,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:57,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605105769] [2021-07-13 20:02:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:57,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:57,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605105769] [2021-07-13 20:02:57,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605105769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:57,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893439934] [2021-07-13 20:02:57,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:58,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:02:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:02:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:02:58,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:58,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:02:58,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:58,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:58,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:58,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-13 20:02:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893439934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:58,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:02:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481367756] [2021-07-13 20:02:58,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:02:58,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:02:58,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:02:58,342 INFO L87 Difference]: Start difference. First operand 9618 states and 43417 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:58,951 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-07-13 20:02:59,666 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-13 20:03:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:01,387 INFO L93 Difference]: Finished difference Result 10754 states and 47765 transitions. [2021-07-13 20:03:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:03:01,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:01,416 INFO L225 Difference]: With dead ends: 10754 [2021-07-13 20:03:01,417 INFO L226 Difference]: Without dead ends: 10557 [2021-07-13 20:03:01,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2427.8ms TimeCoverageRelationStatistics Valid=706, Invalid=4406, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:03:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10557 states. [2021-07-13 20:03:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10557 to 9643. [2021-07-13 20:03:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9643 states, 9642 states have (on average 4.512549263638249) internal successors, (43510), 9642 states have internal predecessors, (43510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 43510 transitions. [2021-07-13 20:03:01,617 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 43510 transitions. Word has length 30 [2021-07-13 20:03:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:01,617 INFO L482 AbstractCegarLoop]: Abstraction has 9643 states and 43510 transitions. [2021-07-13 20:03:01,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 43510 transitions. [2021-07-13 20:03:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:01,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:01,635 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:01,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:01,852 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1336230824, now seen corresponding path program 85 times [2021-07-13 20:03:01,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:01,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321201507] [2021-07-13 20:03:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:02,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:02,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321201507] [2021-07-13 20:03:02,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321201507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:02,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050340677] [2021-07-13 20:03:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:02,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:02,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:02,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:02,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:02,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:02,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:02,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:02,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:02,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050340677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:02,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:02,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 20:03:02,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731882541] [2021-07-13 20:03:02,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:03:02,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:03:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:03:02,369 INFO L87 Difference]: Start difference. First operand 9643 states and 43510 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:03,738 INFO L93 Difference]: Finished difference Result 10091 states and 45230 transitions. [2021-07-13 20:03:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:03:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:03,766 INFO L225 Difference]: With dead ends: 10091 [2021-07-13 20:03:03,766 INFO L226 Difference]: Without dead ends: 9977 [2021-07-13 20:03:03,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1050.3ms TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:03:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-07-13 20:03:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 9647. [2021-07-13 20:03:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9647 states, 9646 states have (on average 4.51244038979888) internal successors, (43527), 9646 states have internal predecessors, (43527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9647 states to 9647 states and 43527 transitions. [2021-07-13 20:03:03,964 INFO L78 Accepts]: Start accepts. Automaton has 9647 states and 43527 transitions. Word has length 30 [2021-07-13 20:03:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:03,965 INFO L482 AbstractCegarLoop]: Abstraction has 9647 states and 43527 transitions. [2021-07-13 20:03:03,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9647 states and 43527 transitions. [2021-07-13 20:03:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:03,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:03,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:04,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:04,197 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1868987806, now seen corresponding path program 86 times [2021-07-13 20:03:04,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:04,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221037271] [2021-07-13 20:03:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:04,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:04,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221037271] [2021-07-13 20:03:04,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221037271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:04,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440911192] [2021-07-13 20:03:04,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:04,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:04,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:04,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:04,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:04,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:04,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:04,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:03:04,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:04,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:04,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:04,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-13 20:03:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:04,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440911192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:04,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:04,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:03:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352994873] [2021-07-13 20:03:04,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:04,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:04,904 INFO L87 Difference]: Start difference. First operand 9647 states and 43527 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:06,252 INFO L93 Difference]: Finished difference Result 10074 states and 45069 transitions. [2021-07-13 20:03:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:03:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:06,279 INFO L225 Difference]: With dead ends: 10074 [2021-07-13 20:03:06,279 INFO L226 Difference]: Without dead ends: 9926 [2021-07-13 20:03:06,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:03:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-07-13 20:03:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9646. [2021-07-13 20:03:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9646 states, 9645 states have (on average 4.511767755313634) internal successors, (43516), 9645 states have internal predecessors, (43516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9646 states to 9646 states and 43516 transitions. [2021-07-13 20:03:06,481 INFO L78 Accepts]: Start accepts. Automaton has 9646 states and 43516 transitions. Word has length 30 [2021-07-13 20:03:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:06,481 INFO L482 AbstractCegarLoop]: Abstraction has 9646 states and 43516 transitions. [2021-07-13 20:03:06,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9646 states and 43516 transitions. [2021-07-13 20:03:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:06,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:06,500 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:06,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:06,709 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 580244706, now seen corresponding path program 87 times [2021-07-13 20:03:06,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:06,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540981997] [2021-07-13 20:03:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:07,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540981997] [2021-07-13 20:03:07,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540981997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056840149] [2021-07-13 20:03:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:07,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:03:07,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:07,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:07,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:03:07,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:07,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:07,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:07,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-07-13 20:03:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056840149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:07,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:07,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:03:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156095350] [2021-07-13 20:03:07,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:07,579 INFO L87 Difference]: Start difference. First operand 9646 states and 43516 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:10,512 INFO L93 Difference]: Finished difference Result 10339 states and 45896 transitions. [2021-07-13 20:03:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:03:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:10,539 INFO L225 Difference]: With dead ends: 10339 [2021-07-13 20:03:10,539 INFO L226 Difference]: Without dead ends: 10115 [2021-07-13 20:03:10,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2560.7ms TimeCoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:03:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10115 states. [2021-07-13 20:03:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10115 to 9648. [2021-07-13 20:03:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9648 states, 9647 states have (on average 4.511454338136208) internal successors, (43522), 9647 states have internal predecessors, (43522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9648 states to 9648 states and 43522 transitions. [2021-07-13 20:03:10,781 INFO L78 Accepts]: Start accepts. Automaton has 9648 states and 43522 transitions. Word has length 30 [2021-07-13 20:03:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:10,781 INFO L482 AbstractCegarLoop]: Abstraction has 9648 states and 43522 transitions. [2021-07-13 20:03:10,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 9648 states and 43522 transitions. [2021-07-13 20:03:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:10,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:10,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:11,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-07-13 20:03:11,000 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1970358584, now seen corresponding path program 88 times [2021-07-13 20:03:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:11,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562681921] [2021-07-13 20:03:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:11,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:11,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562681921] [2021-07-13 20:03:11,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562681921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:11,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759546736] [2021-07-13 20:03:11,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:11,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:11,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:11,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:11,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:11,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:11,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:11,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:11,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759546736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:11,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:11,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:03:11,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546028453] [2021-07-13 20:03:11,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:11,492 INFO L87 Difference]: Start difference. First operand 9648 states and 43522 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:12,815 INFO L93 Difference]: Finished difference Result 10091 states and 45177 transitions. [2021-07-13 20:03:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:03:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:12,841 INFO L225 Difference]: With dead ends: 10091 [2021-07-13 20:03:12,841 INFO L226 Difference]: Without dead ends: 9959 [2021-07-13 20:03:12,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1092.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:03:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9959 states. [2021-07-13 20:03:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9959 to 9659. [2021-07-13 20:03:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9659 states, 9658 states have (on average 4.510147028370263) internal successors, (43559), 9658 states have internal predecessors, (43559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9659 states to 9659 states and 43559 transitions. [2021-07-13 20:03:13,030 INFO L78 Accepts]: Start accepts. Automaton has 9659 states and 43559 transitions. Word has length 30 [2021-07-13 20:03:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:13,030 INFO L482 AbstractCegarLoop]: Abstraction has 9659 states and 43559 transitions. [2021-07-13 20:03:13,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9659 states and 43559 transitions. [2021-07-13 20:03:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:13,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:13,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:13,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-07-13 20:03:13,249 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 555435182, now seen corresponding path program 89 times [2021-07-13 20:03:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:13,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89834444] [2021-07-13 20:03:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:13,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:13,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89834444] [2021-07-13 20:03:13,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89834444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:13,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306162969] [2021-07-13 20:03:13,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:13,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:03:13,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:13,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:13,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:03:13,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:13,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:13,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:13,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:183 [2021-07-13 20:03:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:13,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306162969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:13,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:13,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:03:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202967997] [2021-07-13 20:03:13,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:13,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:13,742 INFO L87 Difference]: Start difference. First operand 9659 states and 43559 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:15,404 INFO L93 Difference]: Finished difference Result 10624 states and 47359 transitions. [2021-07-13 20:03:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:03:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:15,430 INFO L225 Difference]: With dead ends: 10624 [2021-07-13 20:03:15,431 INFO L226 Difference]: Without dead ends: 10519 [2021-07-13 20:03:15,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1322.9ms TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:03:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-07-13 20:03:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 9659. [2021-07-13 20:03:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9659 states, 9658 states have (on average 4.510147028370263) internal successors, (43559), 9658 states have internal predecessors, (43559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9659 states to 9659 states and 43559 transitions. [2021-07-13 20:03:15,623 INFO L78 Accepts]: Start accepts. Automaton has 9659 states and 43559 transitions. Word has length 30 [2021-07-13 20:03:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:15,623 INFO L482 AbstractCegarLoop]: Abstraction has 9659 states and 43559 transitions. [2021-07-13 20:03:15,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 9659 states and 43559 transitions. [2021-07-13 20:03:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:15,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:15,641 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:15,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-07-13 20:03:15,842 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1224813476, now seen corresponding path program 90 times [2021-07-13 20:03:15,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:15,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102346232] [2021-07-13 20:03:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:16,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102346232] [2021-07-13 20:03:16,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102346232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866722467] [2021-07-13 20:03:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:16,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:03:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:16,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:16,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:16,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:03:16,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:16,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:16,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:16,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-07-13 20:03:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:16,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866722467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:16,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:16,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:03:16,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863177981] [2021-07-13 20:03:16,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:03:16,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:16,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:03:16,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:16,351 INFO L87 Difference]: Start difference. First operand 9659 states and 43559 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:18,668 INFO L93 Difference]: Finished difference Result 10804 states and 48122 transitions. [2021-07-13 20:03:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:03:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:18,696 INFO L225 Difference]: With dead ends: 10804 [2021-07-13 20:03:18,696 INFO L226 Difference]: Without dead ends: 10684 [2021-07-13 20:03:18,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1680.8ms TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:03:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10684 states. [2021-07-13 20:03:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10684 to 9658. [2021-07-13 20:03:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9658 states, 9657 states have (on average 4.5096820958889925) internal successors, (43550), 9657 states have internal predecessors, (43550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9658 states to 9658 states and 43550 transitions. [2021-07-13 20:03:18,890 INFO L78 Accepts]: Start accepts. Automaton has 9658 states and 43550 transitions. Word has length 30 [2021-07-13 20:03:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:18,890 INFO L482 AbstractCegarLoop]: Abstraction has 9658 states and 43550 transitions. [2021-07-13 20:03:18,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 9658 states and 43550 transitions. [2021-07-13 20:03:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:18,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:18,909 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:19,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:19,110 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1485718586, now seen corresponding path program 91 times [2021-07-13 20:03:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:19,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683015293] [2021-07-13 20:03:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:19,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:19,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683015293] [2021-07-13 20:03:19,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683015293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:19,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030794790] [2021-07-13 20:03:19,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:19,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:19,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:19,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:19,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:19,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030794790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:19,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:19,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:03:19,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321229568] [2021-07-13 20:03:19,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:03:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:03:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:03:19,537 INFO L87 Difference]: Start difference. First operand 9658 states and 43550 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:20,984 INFO L93 Difference]: Finished difference Result 10438 states and 46550 transitions. [2021-07-13 20:03:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:03:20,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:21,011 INFO L225 Difference]: With dead ends: 10438 [2021-07-13 20:03:21,012 INFO L226 Difference]: Without dead ends: 10267 [2021-07-13 20:03:21,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1186.7ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:03:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10267 states. [2021-07-13 20:03:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10267 to 9644. [2021-07-13 20:03:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9644 states, 9643 states have (on average 4.512081302499222) internal successors, (43510), 9643 states have internal predecessors, (43510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9644 states to 9644 states and 43510 transitions. [2021-07-13 20:03:21,247 INFO L78 Accepts]: Start accepts. Automaton has 9644 states and 43510 transitions. Word has length 30 [2021-07-13 20:03:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:21,247 INFO L482 AbstractCegarLoop]: Abstraction has 9644 states and 43510 transitions. [2021-07-13 20:03:21,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 9644 states and 43510 transitions. [2021-07-13 20:03:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:21,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:21,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:21,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:21,466 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 97329558, now seen corresponding path program 8 times [2021-07-13 20:03:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:21,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845019835] [2021-07-13 20:03:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:21,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:21,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845019835] [2021-07-13 20:03:21,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845019835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:21,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604433918] [2021-07-13 20:03:21,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:21,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:21,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:21,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:21,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:21,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:21,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:21,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:21,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:03:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604433918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:21,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:21,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 20:03:21,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933761430] [2021-07-13 20:03:21,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:03:21,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:03:21,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:03:21,806 INFO L87 Difference]: Start difference. First operand 9644 states and 43510 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:22,521 INFO L93 Difference]: Finished difference Result 10148 states and 45370 transitions. [2021-07-13 20:03:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:03:22,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:22,549 INFO L225 Difference]: With dead ends: 10148 [2021-07-13 20:03:22,549 INFO L226 Difference]: Without dead ends: 9947 [2021-07-13 20:03:22,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9947 states. [2021-07-13 20:03:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9947 to 9647. [2021-07-13 20:03:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9647 states, 9646 states have (on average 4.512025710138918) internal successors, (43523), 9646 states have internal predecessors, (43523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9647 states to 9647 states and 43523 transitions. [2021-07-13 20:03:22,752 INFO L78 Accepts]: Start accepts. Automaton has 9647 states and 43523 transitions. Word has length 30 [2021-07-13 20:03:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:22,752 INFO L482 AbstractCegarLoop]: Abstraction has 9647 states and 43523 transitions. [2021-07-13 20:03:22,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 9647 states and 43523 transitions. [2021-07-13 20:03:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:22,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:22,771 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:22,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-07-13 20:03:22,972 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash -949036506, now seen corresponding path program 72 times [2021-07-13 20:03:22,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:22,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921724512] [2021-07-13 20:03:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:23,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:23,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921724512] [2021-07-13 20:03:23,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921724512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:23,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618187883] [2021-07-13 20:03:23,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:23,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:03:23,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:23,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:23,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:23,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:23,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:23,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:23,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:23,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:23,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:03:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:23,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618187883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:23,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:23,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:03:23,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3244661] [2021-07-13 20:03:23,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:03:23,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:03:23,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:03:23,363 INFO L87 Difference]: Start difference. First operand 9647 states and 43523 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:24,167 INFO L93 Difference]: Finished difference Result 10033 states and 44998 transitions. [2021-07-13 20:03:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:03:24,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:24,195 INFO L225 Difference]: With dead ends: 10033 [2021-07-13 20:03:24,195 INFO L226 Difference]: Without dead ends: 9935 [2021-07-13 20:03:24,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 525.0ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:03:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2021-07-13 20:03:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 9662. [2021-07-13 20:03:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 9661 states have (on average 4.511334230410931) internal successors, (43584), 9661 states have internal predecessors, (43584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 43584 transitions. [2021-07-13 20:03:24,441 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 43584 transitions. Word has length 30 [2021-07-13 20:03:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:24,441 INFO L482 AbstractCegarLoop]: Abstraction has 9662 states and 43584 transitions. [2021-07-13 20:03:24,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 43584 transitions. [2021-07-13 20:03:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:24,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:24,461 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:24,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:24,661 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:24,662 INFO L82 PathProgramCache]: Analyzing trace with hash -328552440, now seen corresponding path program 73 times [2021-07-13 20:03:24,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:24,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382795489] [2021-07-13 20:03:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:24,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:24,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382795489] [2021-07-13 20:03:24,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382795489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:24,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430381939] [2021-07-13 20:03:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:25,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:25,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:25,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:25,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:25,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:25,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:25,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:25,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:03:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430381939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:25,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:25,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:03:25,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525393736] [2021-07-13 20:03:25,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:03:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:03:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:03:25,044 INFO L87 Difference]: Start difference. First operand 9662 states and 43584 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:25,752 INFO L93 Difference]: Finished difference Result 9994 states and 44825 transitions. [2021-07-13 20:03:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:03:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:25,779 INFO L225 Difference]: With dead ends: 9994 [2021-07-13 20:03:25,780 INFO L226 Difference]: Without dead ends: 9902 [2021-07-13 20:03:25,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:03:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9902 states. [2021-07-13 20:03:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9902 to 9656. [2021-07-13 20:03:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9656 states, 9655 states have (on average 4.5112377006732265) internal successors, (43556), 9655 states have internal predecessors, (43556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9656 states to 9656 states and 43556 transitions. [2021-07-13 20:03:25,982 INFO L78 Accepts]: Start accepts. Automaton has 9656 states and 43556 transitions. Word has length 30 [2021-07-13 20:03:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:25,982 INFO L482 AbstractCegarLoop]: Abstraction has 9656 states and 43556 transitions. [2021-07-13 20:03:25,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9656 states and 43556 transitions. [2021-07-13 20:03:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:26,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:26,001 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:26,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-07-13 20:03:26,202 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2032488358, now seen corresponding path program 74 times [2021-07-13 20:03:26,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:26,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244372243] [2021-07-13 20:03:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:26,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244372243] [2021-07-13 20:03:26,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244372243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:26,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637527690] [2021-07-13 20:03:26,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:26,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:26,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:26,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:26,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:03:26,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:26,672 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 20:03:26,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:26,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 20:03:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:26,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637527690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:26,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:26,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:03:26,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628946817] [2021-07-13 20:03:26,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:26,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:26,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:26,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:26,714 INFO L87 Difference]: Start difference. First operand 9656 states and 43556 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:27,848 INFO L93 Difference]: Finished difference Result 10259 states and 45849 transitions. [2021-07-13 20:03:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:03:27,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:27,879 INFO L225 Difference]: With dead ends: 10259 [2021-07-13 20:03:27,879 INFO L226 Difference]: Without dead ends: 10143 [2021-07-13 20:03:27,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 801.6ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:03:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-07-13 20:03:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 9650. [2021-07-13 20:03:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9650 states, 9649 states have (on average 4.511762876982071) internal successors, (43534), 9649 states have internal predecessors, (43534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9650 states to 9650 states and 43534 transitions. [2021-07-13 20:03:28,097 INFO L78 Accepts]: Start accepts. Automaton has 9650 states and 43534 transitions. Word has length 30 [2021-07-13 20:03:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:28,097 INFO L482 AbstractCegarLoop]: Abstraction has 9650 states and 43534 transitions. [2021-07-13 20:03:28,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 9650 states and 43534 transitions. [2021-07-13 20:03:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:28,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:28,118 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:28,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:28,318 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash -782480168, now seen corresponding path program 75 times [2021-07-13 20:03:28,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:28,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999868209] [2021-07-13 20:03:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:28,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999868209] [2021-07-13 20:03:28,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999868209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:28,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696304451] [2021-07-13 20:03:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:28,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:03:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:28,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:28,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:28,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:28,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:28,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:28,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:28,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696304451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:28,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:28,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:03:28,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141974839] [2021-07-13 20:03:28,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:03:28,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:03:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:03:28,698 INFO L87 Difference]: Start difference. First operand 9650 states and 43534 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:29,623 INFO L93 Difference]: Finished difference Result 10141 states and 45411 transitions. [2021-07-13 20:03:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:03:29,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:29,651 INFO L225 Difference]: With dead ends: 10141 [2021-07-13 20:03:29,652 INFO L226 Difference]: Without dead ends: 10037 [2021-07-13 20:03:29,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:03:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10037 states. [2021-07-13 20:03:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10037 to 9672. [2021-07-13 20:03:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.510391893289215) internal successors, (43620), 9671 states have internal predecessors, (43620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43620 transitions. [2021-07-13 20:03:29,860 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43620 transitions. Word has length 30 [2021-07-13 20:03:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:29,861 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43620 transitions. [2021-07-13 20:03:29,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43620 transitions. [2021-07-13 20:03:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:29,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:29,880 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-07-13 20:03:30,081 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash 961883838, now seen corresponding path program 76 times [2021-07-13 20:03:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451434287] [2021-07-13 20:03:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:30,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451434287] [2021-07-13 20:03:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451434287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546228379] [2021-07-13 20:03:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:30,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:30,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:30,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:30,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:30,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:30,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:30,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:30,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:30,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546228379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:30,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:30,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:03:30,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728839553] [2021-07-13 20:03:30,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:03:30,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:30,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:03:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:03:30,466 INFO L87 Difference]: Start difference. First operand 9672 states and 43620 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:31,371 INFO L93 Difference]: Finished difference Result 10015 states and 44923 transitions. [2021-07-13 20:03:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:03:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:31,399 INFO L225 Difference]: With dead ends: 10015 [2021-07-13 20:03:31,399 INFO L226 Difference]: Without dead ends: 9917 [2021-07-13 20:03:31,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:03:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9917 states. [2021-07-13 20:03:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9917 to 9678. [2021-07-13 20:03:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 4.510282112224863) internal successors, (43646), 9677 states have internal predecessors, (43646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 43646 transitions. [2021-07-13 20:03:31,613 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 43646 transitions. Word has length 30 [2021-07-13 20:03:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:31,613 INFO L482 AbstractCegarLoop]: Abstraction has 9678 states and 43646 transitions. [2021-07-13 20:03:31,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 43646 transitions. [2021-07-13 20:03:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:31,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:31,633 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:31,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:31,834 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1582367904, now seen corresponding path program 77 times [2021-07-13 20:03:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:31,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368825937] [2021-07-13 20:03:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368825937] [2021-07-13 20:03:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368825937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494895460] [2021-07-13 20:03:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:32,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:32,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:32,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:32,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:32,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:32,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:32,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:32,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:32,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:32,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494895460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:32,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:32,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:03:32,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155221738] [2021-07-13 20:03:32,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:03:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:03:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:03:32,202 INFO L87 Difference]: Start difference. First operand 9678 states and 43646 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:32,939 INFO L93 Difference]: Finished difference Result 10011 states and 44888 transitions. [2021-07-13 20:03:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:03:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:32,967 INFO L225 Difference]: With dead ends: 10011 [2021-07-13 20:03:32,967 INFO L226 Difference]: Without dead ends: 9919 [2021-07-13 20:03:32,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:03:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2021-07-13 20:03:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 9672. [2021-07-13 20:03:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.509978285596112) internal successors, (43616), 9671 states have internal predecessors, (43616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43616 transitions. [2021-07-13 20:03:33,179 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43616 transitions. Word has length 30 [2021-07-13 20:03:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:33,179 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43616 transitions. [2021-07-13 20:03:33,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43616 transitions. [2021-07-13 20:03:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:33,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:33,198 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:33,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-07-13 20:03:33,399 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1941336736, now seen corresponding path program 78 times [2021-07-13 20:03:33,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:33,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887955532] [2021-07-13 20:03:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:33,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887955532] [2021-07-13 20:03:33,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887955532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667952332] [2021-07-13 20:03:33,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:33,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:03:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:33,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:33,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:33,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-13 20:03:33,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:33,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:33,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:33,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-07-13 20:03:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:34,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667952332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:34,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:34,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:03:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604851210] [2021-07-13 20:03:34,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:34,019 INFO L87 Difference]: Start difference. First operand 9672 states and 43616 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:34,300 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-13 20:03:34,487 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-13 20:03:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:35,910 INFO L93 Difference]: Finished difference Result 10391 states and 46257 transitions. [2021-07-13 20:03:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:03:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:35,939 INFO L225 Difference]: With dead ends: 10391 [2021-07-13 20:03:35,939 INFO L226 Difference]: Without dead ends: 10148 [2021-07-13 20:03:35,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1555.2ms TimeCoverageRelationStatistics Valid=409, Invalid=1847, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:03:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-07-13 20:03:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9672. [2021-07-13 20:03:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.509978285596112) internal successors, (43616), 9671 states have internal predecessors, (43616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43616 transitions. [2021-07-13 20:03:36,142 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43616 transitions. Word has length 30 [2021-07-13 20:03:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:36,142 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43616 transitions. [2021-07-13 20:03:36,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43616 transitions. [2021-07-13 20:03:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:36,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:36,162 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:36,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:36,362 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1717163706, now seen corresponding path program 79 times [2021-07-13 20:03:36,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:36,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495216042] [2021-07-13 20:03:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:36,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:36,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495216042] [2021-07-13 20:03:36,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495216042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:36,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304934154] [2021-07-13 20:03:36,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:36,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:36,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:36,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:36,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:36,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:36,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304934154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:36,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:36,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:03:36,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437457971] [2021-07-13 20:03:36,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:03:36,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:36,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:03:36,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:03:36,760 INFO L87 Difference]: Start difference. First operand 9672 states and 43616 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:37,582 INFO L93 Difference]: Finished difference Result 10101 states and 45229 transitions. [2021-07-13 20:03:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:03:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:37,610 INFO L225 Difference]: With dead ends: 10101 [2021-07-13 20:03:37,610 INFO L226 Difference]: Without dead ends: 9984 [2021-07-13 20:03:37,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:03:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9984 states. [2021-07-13 20:03:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9984 to 9670. [2021-07-13 20:03:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9670 states, 9669 states have (on average 4.509876926259179) internal successors, (43606), 9669 states have internal predecessors, (43606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9670 states to 9670 states and 43606 transitions. [2021-07-13 20:03:37,809 INFO L78 Accepts]: Start accepts. Automaton has 9670 states and 43606 transitions. Word has length 30 [2021-07-13 20:03:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:37,809 INFO L482 AbstractCegarLoop]: Abstraction has 9670 states and 43606 transitions. [2021-07-13 20:03:37,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 9670 states and 43606 transitions. [2021-07-13 20:03:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:37,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:37,829 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:38,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:38,029 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash 853148546, now seen corresponding path program 9 times [2021-07-13 20:03:38,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:38,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621502009] [2021-07-13 20:03:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:38,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:38,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621502009] [2021-07-13 20:03:38,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621502009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:38,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490973570] [2021-07-13 20:03:38,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:38,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:03:38,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:38,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:38,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:38,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:38,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:03:38,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:38,418 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 20:03:38,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:38,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 20:03:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:38,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490973570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:38,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:38,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-13 20:03:38,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56791283] [2021-07-13 20:03:38,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:03:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:38,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:03:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:03:38,443 INFO L87 Difference]: Start difference. First operand 9670 states and 43606 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:39,155 INFO L93 Difference]: Finished difference Result 10056 states and 45043 transitions. [2021-07-13 20:03:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:03:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:39,182 INFO L225 Difference]: With dead ends: 10056 [2021-07-13 20:03:39,183 INFO L226 Difference]: Without dead ends: 9961 [2021-07-13 20:03:39,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:03:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-07-13 20:03:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 9688. [2021-07-13 20:03:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9687 states have (on average 4.50923918653866) internal successors, (43681), 9687 states have internal predecessors, (43681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 43681 transitions. [2021-07-13 20:03:39,381 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 43681 transitions. Word has length 30 [2021-07-13 20:03:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:39,381 INFO L482 AbstractCegarLoop]: Abstraction has 9688 states and 43681 transitions. [2021-07-13 20:03:39,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 43681 transitions. [2021-07-13 20:03:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:39,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:39,401 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:39,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-07-13 20:03:39,601 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1718803998, now seen corresponding path program 80 times [2021-07-13 20:03:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605551820] [2021-07-13 20:03:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:39,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:39,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605551820] [2021-07-13 20:03:39,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605551820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:39,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546279669] [2021-07-13 20:03:39,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:39,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:39,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:03:40,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:40,092 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-07-13 20:03:40,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:40,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-07-13 20:03:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:40,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546279669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:40,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:40,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:03:40,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67560134] [2021-07-13 20:03:40,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:40,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:40,135 INFO L87 Difference]: Start difference. First operand 9688 states and 43681 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:41,402 INFO L93 Difference]: Finished difference Result 10181 states and 45531 transitions. [2021-07-13 20:03:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:03:41,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:41,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:41,430 INFO L225 Difference]: With dead ends: 10181 [2021-07-13 20:03:41,430 INFO L226 Difference]: Without dead ends: 10069 [2021-07-13 20:03:41,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:03:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10069 states. [2021-07-13 20:03:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10069 to 9690. [2021-07-13 20:03:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 4.509340489214574) internal successors, (43691), 9689 states have internal predecessors, (43691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 43691 transitions. [2021-07-13 20:03:41,630 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 43691 transitions. Word has length 30 [2021-07-13 20:03:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:41,630 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 43691 transitions. [2021-07-13 20:03:41,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 43691 transitions. [2021-07-13 20:03:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:41,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:41,650 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:41,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-13 20:03:41,850 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1721578654, now seen corresponding path program 81 times [2021-07-13 20:03:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:41,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038565129] [2021-07-13 20:03:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:42,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:42,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038565129] [2021-07-13 20:03:42,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038565129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:42,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587188474] [2021-07-13 20:03:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:42,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:03:42,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:42,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:42,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:42,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:42,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:42,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-07-13 20:03:42,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:42,283 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-13 20:03:42,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:42,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-07-13 20:03:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:42,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587188474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:42,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:42,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:03:42,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927831543] [2021-07-13 20:03:42,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:03:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:03:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:03:42,341 INFO L87 Difference]: Start difference. First operand 9690 states and 43691 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:43,630 INFO L93 Difference]: Finished difference Result 10357 states and 46205 transitions. [2021-07-13 20:03:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:03:43,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:43,658 INFO L225 Difference]: With dead ends: 10357 [2021-07-13 20:03:43,658 INFO L226 Difference]: Without dead ends: 10250 [2021-07-13 20:03:43,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1043.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:03:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-07-13 20:03:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9697. [2021-07-13 20:03:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9697 states, 9696 states have (on average 4.507838283828383) internal successors, (43708), 9696 states have internal predecessors, (43708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 43708 transitions. [2021-07-13 20:03:43,900 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 43708 transitions. Word has length 30 [2021-07-13 20:03:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:43,900 INFO L482 AbstractCegarLoop]: Abstraction has 9697 states and 43708 transitions. [2021-07-13 20:03:43,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 43708 transitions. [2021-07-13 20:03:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:43,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:43,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:44,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-07-13 20:03:44,119 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1215232388, now seen corresponding path program 82 times [2021-07-13 20:03:44,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:44,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948613584] [2021-07-13 20:03:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:44,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948613584] [2021-07-13 20:03:44,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948613584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:44,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134222075] [2021-07-13 20:03:44,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:44,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:44,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:44,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:44,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:44,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-13 20:03:44,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:44,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:44,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:44,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-07-13 20:03:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134222075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:44,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:44,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:03:44,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033036858] [2021-07-13 20:03:44,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:44,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:44,557 INFO L87 Difference]: Start difference. First operand 9697 states and 43708 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:45,599 INFO L93 Difference]: Finished difference Result 10237 states and 45770 transitions. [2021-07-13 20:03:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:03:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:45,627 INFO L225 Difference]: With dead ends: 10237 [2021-07-13 20:03:45,627 INFO L226 Difference]: Without dead ends: 10106 [2021-07-13 20:03:45,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:03:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-07-13 20:03:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9688. [2021-07-13 20:03:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9687 states have (on average 4.50934241767317) internal successors, (43682), 9687 states have internal predecessors, (43682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 43682 transitions. [2021-07-13 20:03:45,824 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 43682 transitions. Word has length 30 [2021-07-13 20:03:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:45,824 INFO L482 AbstractCegarLoop]: Abstraction has 9688 states and 43682 transitions. [2021-07-13 20:03:45,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 43682 transitions. [2021-07-13 20:03:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:45,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:45,843 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:46,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-07-13 20:03:46,043 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:46,044 INFO L82 PathProgramCache]: Analyzing trace with hash 922714558, now seen corresponding path program 83 times [2021-07-13 20:03:46,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:46,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129423382] [2021-07-13 20:03:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:46,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129423382] [2021-07-13 20:03:46,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129423382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:46,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904412913] [2021-07-13 20:03:46,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:46,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:46,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:46,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:46,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:46,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:46,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:46,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:46,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:46,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:03:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:46,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904412913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:46,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:46,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:03:46,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954239385] [2021-07-13 20:03:46,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:03:46,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:03:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:03:46,407 INFO L87 Difference]: Start difference. First operand 9688 states and 43682 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:47,336 INFO L93 Difference]: Finished difference Result 10180 states and 45546 transitions. [2021-07-13 20:03:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:03:47,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:47,362 INFO L225 Difference]: With dead ends: 10180 [2021-07-13 20:03:47,362 INFO L226 Difference]: Without dead ends: 10075 [2021-07-13 20:03:47,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:03:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-07-13 20:03:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 9682. [2021-07-13 20:03:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9682 states, 9681 states have (on average 4.5093482078297695) internal successors, (43655), 9681 states have internal predecessors, (43655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9682 states to 9682 states and 43655 transitions. [2021-07-13 20:03:47,554 INFO L78 Accepts]: Start accepts. Automaton has 9682 states and 43655 transitions. Word has length 30 [2021-07-13 20:03:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:47,554 INFO L482 AbstractCegarLoop]: Abstraction has 9682 states and 43655 transitions. [2021-07-13 20:03:47,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states and 43655 transitions. [2021-07-13 20:03:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:47,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:47,573 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:47,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable764,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:47,773 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -216230256, now seen corresponding path program 92 times [2021-07-13 20:03:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379595212] [2021-07-13 20:03:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:47,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:47,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379595212] [2021-07-13 20:03:47,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379595212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:47,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795093979] [2021-07-13 20:03:47,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:47,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:47,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:47,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:48,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:48,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:03:48,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:03:48,166 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-07-13 20:03:48,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:48,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:51 [2021-07-13 20:03:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:48,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795093979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:48,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:03:48,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898580019] [2021-07-13 20:03:48,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:48,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:48,280 INFO L87 Difference]: Start difference. First operand 9682 states and 43655 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:51,134 INFO L93 Difference]: Finished difference Result 12354 states and 53928 transitions. [2021-07-13 20:03:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:03:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:51,166 INFO L225 Difference]: With dead ends: 12354 [2021-07-13 20:03:51,166 INFO L226 Difference]: Without dead ends: 12039 [2021-07-13 20:03:51,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1498.7ms TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:03:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12039 states. [2021-07-13 20:03:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12039 to 9835. [2021-07-13 20:03:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9835 states, 9834 states have (on average 4.511287370347773) internal successors, (44364), 9834 states have internal predecessors, (44364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9835 states to 9835 states and 44364 transitions. [2021-07-13 20:03:51,397 INFO L78 Accepts]: Start accepts. Automaton has 9835 states and 44364 transitions. Word has length 30 [2021-07-13 20:03:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:51,397 INFO L482 AbstractCegarLoop]: Abstraction has 9835 states and 44364 transitions. [2021-07-13 20:03:51,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 9835 states and 44364 transitions. [2021-07-13 20:03:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:51,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:51,416 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:51,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-07-13 20:03:51,633 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -31236598, now seen corresponding path program 84 times [2021-07-13 20:03:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875509073] [2021-07-13 20:03:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:51,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:51,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875509073] [2021-07-13 20:03:51,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875509073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:51,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24991978] [2021-07-13 20:03:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:51,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:03:51,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:52,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:52,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-07-13 20:03:52,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:03:52,109 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-07-13 20:03:52,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:52,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:51 [2021-07-13 20:03:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:52,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24991978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:52,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:52,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-07-13 20:03:52,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020013329] [2021-07-13 20:03:52,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:52,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:52,184 INFO L87 Difference]: Start difference. First operand 9835 states and 44364 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,551 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-07-13 20:03:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:54,601 INFO L93 Difference]: Finished difference Result 11735 states and 51333 transitions. [2021-07-13 20:03:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:03:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:54,632 INFO L225 Difference]: With dead ends: 11735 [2021-07-13 20:03:54,632 INFO L226 Difference]: Without dead ends: 11585 [2021-07-13 20:03:54,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1364.2ms TimeCoverageRelationStatistics Valid=219, Invalid=2133, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:03:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2021-07-13 20:03:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9827. [2021-07-13 20:03:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9827 states, 9826 states have (on average 4.511500101770812) internal successors, (44330), 9826 states have internal predecessors, (44330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 44330 transitions. [2021-07-13 20:03:54,853 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 44330 transitions. Word has length 30 [2021-07-13 20:03:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:54,853 INFO L482 AbstractCegarLoop]: Abstraction has 9827 states and 44330 transitions. [2021-07-13 20:03:54,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 44330 transitions. [2021-07-13 20:03:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:54,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:54,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:55,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:55,085 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1191371828, now seen corresponding path program 93 times [2021-07-13 20:03:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578103359] [2021-07-13 20:03:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:55,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578103359] [2021-07-13 20:03:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578103359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682121909] [2021-07-13 20:03:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:55,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:03:55,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:03:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:55,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:55,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:55,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:03:55,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:55,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:55,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:55,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-13 20:03:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682121909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:55,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:55,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:03:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870703846] [2021-07-13 20:03:55,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:03:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:03:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:03:55,672 INFO L87 Difference]: Start difference. First operand 9827 states and 44330 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:58,407 INFO L93 Difference]: Finished difference Result 11747 states and 51542 transitions. [2021-07-13 20:03:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:03:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:03:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:58,436 INFO L225 Difference]: With dead ends: 11747 [2021-07-13 20:03:58,437 INFO L226 Difference]: Without dead ends: 11531 [2021-07-13 20:03:58,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1830.6ms TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:03:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11531 states. [2021-07-13 20:03:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11531 to 9837. [2021-07-13 20:03:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9837 states, 9836 states have (on average 4.511895079300529) internal successors, (44379), 9836 states have internal predecessors, (44379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 44379 transitions. [2021-07-13 20:03:58,637 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 44379 transitions. Word has length 30 [2021-07-13 20:03:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:58,637 INFO L482 AbstractCegarLoop]: Abstraction has 9837 states and 44379 transitions. [2021-07-13 20:03:58,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 44379 transitions. [2021-07-13 20:03:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:03:58,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:58,655 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:58,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-07-13 20:03:58,856 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1504898224, now seen corresponding path program 94 times [2021-07-13 20:03:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:58,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543828942] [2021-07-13 20:03:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:59,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:59,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543828942] [2021-07-13 20:03:59,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543828942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146415996] [2021-07-13 20:03:59,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:59,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:59,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:03:59,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:59,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:03:59,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:59,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:03:59,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:03:59,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:03:59,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:03:59,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:03:59,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:03:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:59,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146415996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:59,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:03:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582068514] [2021-07-13 20:03:59,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:03:59,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:59,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:03:59,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:03:59,256 INFO L87 Difference]: Start difference. First operand 9837 states and 44379 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:01,790 INFO L93 Difference]: Finished difference Result 12789 states and 55993 transitions. [2021-07-13 20:04:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:04:01,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:01,825 INFO L225 Difference]: With dead ends: 12789 [2021-07-13 20:04:01,825 INFO L226 Difference]: Without dead ends: 12618 [2021-07-13 20:04:01,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1690.5ms TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:04:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12618 states. [2021-07-13 20:04:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12618 to 9841. [2021-07-13 20:04:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9841 states, 9840 states have (on average 4.511788617886179) internal successors, (44396), 9840 states have internal predecessors, (44396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9841 states to 9841 states and 44396 transitions. [2021-07-13 20:04:02,056 INFO L78 Accepts]: Start accepts. Automaton has 9841 states and 44396 transitions. Word has length 30 [2021-07-13 20:04:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:02,056 INFO L482 AbstractCegarLoop]: Abstraction has 9841 states and 44396 transitions. [2021-07-13 20:04:02,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 9841 states and 44396 transitions. [2021-07-13 20:04:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:02,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:02,075 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:02,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-07-13 20:04:02,276 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash 675291786, now seen corresponding path program 85 times [2021-07-13 20:04:02,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:02,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447284377] [2021-07-13 20:04:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:02,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:02,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447284377] [2021-07-13 20:04:02,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447284377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:02,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181993487] [2021-07-13 20:04:02,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:02,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:02,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:02,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:02,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:02,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:04:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:02,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181993487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:02,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:02,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:04:02,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529517063] [2021-07-13 20:04:02,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:04:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:04:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:04:02,670 INFO L87 Difference]: Start difference. First operand 9841 states and 44396 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:03,781 INFO L93 Difference]: Finished difference Result 10378 states and 46494 transitions. [2021-07-13 20:04:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:04:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:03,812 INFO L225 Difference]: With dead ends: 10378 [2021-07-13 20:04:03,813 INFO L226 Difference]: Without dead ends: 10289 [2021-07-13 20:04:03,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:04:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10289 states. [2021-07-13 20:04:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10289 to 9846. [2021-07-13 20:04:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 4.51213814118842) internal successors, (44422), 9845 states have internal predecessors, (44422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 44422 transitions. [2021-07-13 20:04:04,035 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 44422 transitions. Word has length 30 [2021-07-13 20:04:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:04,035 INFO L482 AbstractCegarLoop]: Abstraction has 9846 states and 44422 transitions. [2021-07-13 20:04:04,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 44422 transitions. [2021-07-13 20:04:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:04,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:04,054 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:04,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-13 20:04:04,255 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1437745364, now seen corresponding path program 86 times [2021-07-13 20:04:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:04,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207510871] [2021-07-13 20:04:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:04,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:04,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207510871] [2021-07-13 20:04:04,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207510871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:04,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000305151] [2021-07-13 20:04:04,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:04,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:04:04,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:04,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:04,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:04,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:04:04,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:04,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:04,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:04,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-07-13 20:04:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:04,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000305151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:04,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:04,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:04:04,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645275159] [2021-07-13 20:04:04,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:04,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:04,688 INFO L87 Difference]: Start difference. First operand 9846 states and 44422 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:07,344 INFO L93 Difference]: Finished difference Result 13375 states and 57885 transitions. [2021-07-13 20:04:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:04:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:07,385 INFO L225 Difference]: With dead ends: 13375 [2021-07-13 20:04:07,385 INFO L226 Difference]: Without dead ends: 13143 [2021-07-13 20:04:07,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1623.6ms TimeCoverageRelationStatistics Valid=592, Invalid=3440, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:04:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13143 states. [2021-07-13 20:04:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13143 to 9941. [2021-07-13 20:04:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9941 states, 9940 states have (on average 4.513380281690141) internal successors, (44863), 9940 states have internal predecessors, (44863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9941 states to 9941 states and 44863 transitions. [2021-07-13 20:04:07,651 INFO L78 Accepts]: Start accepts. Automaton has 9941 states and 44863 transitions. Word has length 30 [2021-07-13 20:04:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:07,652 INFO L482 AbstractCegarLoop]: Abstraction has 9941 states and 44863 transitions. [2021-07-13 20:04:07,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9941 states and 44863 transitions. [2021-07-13 20:04:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:07,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:07,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:07,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-07-13 20:04:07,872 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1322558186, now seen corresponding path program 95 times [2021-07-13 20:04:07,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:07,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058822111] [2021-07-13 20:04:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:08,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:08,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058822111] [2021-07-13 20:04:08,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058822111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:08,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036501887] [2021-07-13 20:04:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:08,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:04:08,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:08,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:08,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:08,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:08,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-13 20:04:08,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:08,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:08,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:08,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-13 20:04:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:08,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036501887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:08,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:08,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:04:08,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471033814] [2021-07-13 20:04:08,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:04:08,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:08,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:04:08,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:04:08,272 INFO L87 Difference]: Start difference. First operand 9941 states and 44863 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:09,491 INFO L93 Difference]: Finished difference Result 10860 states and 48361 transitions. [2021-07-13 20:04:09,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:04:09,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:09,521 INFO L225 Difference]: With dead ends: 10860 [2021-07-13 20:04:09,521 INFO L226 Difference]: Without dead ends: 10752 [2021-07-13 20:04:09,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:04:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2021-07-13 20:04:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 9959. [2021-07-13 20:04:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 4.513054830287206) internal successors, (44941), 9958 states have internal predecessors, (44941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 44941 transitions. [2021-07-13 20:04:09,759 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 44941 transitions. Word has length 30 [2021-07-13 20:04:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:09,759 INFO L482 AbstractCegarLoop]: Abstraction has 9959 states and 44941 transitions. [2021-07-13 20:04:09,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 44941 transitions. [2021-07-13 20:04:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:09,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:09,780 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:09,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:09,981 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1507551844, now seen corresponding path program 87 times [2021-07-13 20:04:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:09,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161054893] [2021-07-13 20:04:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:10,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161054893] [2021-07-13 20:04:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161054893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:10,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886722628] [2021-07-13 20:04:10,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:10,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:10,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:10,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:10,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-13 20:04:10,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:10,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:10,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-07-13 20:04:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:10,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886722628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:10,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:10,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-07-13 20:04:10,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516931079] [2021-07-13 20:04:10,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:10,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:10,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:10,401 INFO L87 Difference]: Start difference. First operand 9959 states and 44941 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:12,217 INFO L93 Difference]: Finished difference Result 11965 states and 52282 transitions. [2021-07-13 20:04:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:04:12,217 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:12,250 INFO L225 Difference]: With dead ends: 11965 [2021-07-13 20:04:12,250 INFO L226 Difference]: Without dead ends: 11841 [2021-07-13 20:04:12,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1104.2ms TimeCoverageRelationStatistics Valid=285, Invalid=1971, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:04:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11841 states. [2021-07-13 20:04:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11841 to 9951. [2021-07-13 20:04:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 4.512663316582914) internal successors, (44901), 9950 states have internal predecessors, (44901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 44901 transitions. [2021-07-13 20:04:12,488 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 44901 transitions. Word has length 30 [2021-07-13 20:04:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:12,488 INFO L482 AbstractCegarLoop]: Abstraction has 9951 states and 44901 transitions. [2021-07-13 20:04:12,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 44901 transitions. [2021-07-13 20:04:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:12,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:12,509 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:12,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-07-13 20:04:12,710 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:12,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1832674602, now seen corresponding path program 96 times [2021-07-13 20:04:12,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:12,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78905244] [2021-07-13 20:04:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:12,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78905244] [2021-07-13 20:04:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78905244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257998894] [2021-07-13 20:04:12,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:12,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:04:12,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:13,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:13,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:13,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:13,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:13,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:13,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:13,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:04:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257998894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:13,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:13,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:04:13,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184082065] [2021-07-13 20:04:13,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:04:13,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:04:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:04:13,088 INFO L87 Difference]: Start difference. First operand 9951 states and 44901 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:13,980 INFO L93 Difference]: Finished difference Result 10634 states and 47550 transitions. [2021-07-13 20:04:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:04:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:14,010 INFO L225 Difference]: With dead ends: 10634 [2021-07-13 20:04:14,011 INFO L226 Difference]: Without dead ends: 10529 [2021-07-13 20:04:14,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:04:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-07-13 20:04:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 9957. [2021-07-13 20:04:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 4.512354359180394) internal successors, (44925), 9956 states have internal predecessors, (44925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 44925 transitions. [2021-07-13 20:04:14,246 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 44925 transitions. Word has length 30 [2021-07-13 20:04:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:14,246 INFO L482 AbstractCegarLoop]: Abstraction has 9957 states and 44925 transitions. [2021-07-13 20:04:14,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 44925 transitions. [2021-07-13 20:04:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:14,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:14,268 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:14,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:14,469 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash 849814126, now seen corresponding path program 97 times [2021-07-13 20:04:14,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:14,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357746797] [2021-07-13 20:04:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:14,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:14,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357746797] [2021-07-13 20:04:14,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357746797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:14,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734491731] [2021-07-13 20:04:14,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:14,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:14,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:14,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:14,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:14,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:14,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:04:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:14,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734491731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:14,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:14,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:04:14,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506408146] [2021-07-13 20:04:14,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:04:14,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:04:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:04:14,847 INFO L87 Difference]: Start difference. First operand 9957 states and 44925 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:15,872 INFO L93 Difference]: Finished difference Result 10636 states and 47544 transitions. [2021-07-13 20:04:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:04:15,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:15,901 INFO L225 Difference]: With dead ends: 10636 [2021-07-13 20:04:15,902 INFO L226 Difference]: Without dead ends: 10539 [2021-07-13 20:04:15,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:04:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10539 states. [2021-07-13 20:04:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10539 to 9952. [2021-07-13 20:04:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 9951 states have (on average 4.512310320570797) internal successors, (44902), 9951 states have internal predecessors, (44902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 44902 transitions. [2021-07-13 20:04:16,112 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 44902 transitions. Word has length 30 [2021-07-13 20:04:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:16,112 INFO L482 AbstractCegarLoop]: Abstraction has 9952 states and 44902 transitions. [2021-07-13 20:04:16,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 44902 transitions. [2021-07-13 20:04:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:16,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:16,131 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:16,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:16,332 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash -7297126, now seen corresponding path program 88 times [2021-07-13 20:04:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:16,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109526309] [2021-07-13 20:04:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:16,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109526309] [2021-07-13 20:04:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109526309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541601994] [2021-07-13 20:04:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:16,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:16,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:16,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:16,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:16,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:16,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:16,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:16,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:04:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541601994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:16,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:16,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:04:16,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403708508] [2021-07-13 20:04:16,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:04:16,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:16,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:04:16,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:04:16,696 INFO L87 Difference]: Start difference. First operand 9952 states and 44902 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:18,812 INFO L93 Difference]: Finished difference Result 12584 states and 55096 transitions. [2021-07-13 20:04:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:04:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:18,847 INFO L225 Difference]: With dead ends: 12584 [2021-07-13 20:04:18,847 INFO L226 Difference]: Without dead ends: 12420 [2021-07-13 20:04:18,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1346.4ms TimeCoverageRelationStatistics Valid=463, Invalid=2293, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:04:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12420 states. [2021-07-13 20:04:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12420 to 9966. [2021-07-13 20:04:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 4.512895132965379) internal successors, (44971), 9965 states have internal predecessors, (44971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44971 transitions. [2021-07-13 20:04:19,082 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44971 transitions. Word has length 30 [2021-07-13 20:04:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:19,082 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 44971 transitions. [2021-07-13 20:04:19,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44971 transitions. [2021-07-13 20:04:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:19,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:19,101 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:19,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:19,302 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1758731406, now seen corresponding path program 89 times [2021-07-13 20:04:19,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:19,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751808828] [2021-07-13 20:04:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:19,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751808828] [2021-07-13 20:04:19,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751808828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362358350] [2021-07-13 20:04:19,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:19,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:19,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:19,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:19,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:19,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:19,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:19,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:19,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-07-13 20:04:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:19,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362358350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:19,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:04:19,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364770131] [2021-07-13 20:04:19,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:04:19,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:04:19,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:04:19,667 INFO L87 Difference]: Start difference. First operand 9966 states and 44971 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:21,677 INFO L93 Difference]: Finished difference Result 12952 states and 56372 transitions. [2021-07-13 20:04:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:04:21,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:21,716 INFO L225 Difference]: With dead ends: 12952 [2021-07-13 20:04:21,716 INFO L226 Difference]: Without dead ends: 12801 [2021-07-13 20:04:21,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1252.3ms TimeCoverageRelationStatistics Valid=452, Invalid=2200, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:04:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12801 states. [2021-07-13 20:04:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12801 to 9958. [2021-07-13 20:04:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 4.511901175052727) internal successors, (44925), 9957 states have internal predecessors, (44925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 44925 transitions. [2021-07-13 20:04:22,018 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 44925 transitions. Word has length 30 [2021-07-13 20:04:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:22,018 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 44925 transitions. [2021-07-13 20:04:22,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 44925 transitions. [2021-07-13 20:04:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:22,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:22,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:22,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:22,254 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1275770602, now seen corresponding path program 98 times [2021-07-13 20:04:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:22,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867755583] [2021-07-13 20:04:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:22,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867755583] [2021-07-13 20:04:22,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867755583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425221028] [2021-07-13 20:04:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:22,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:22,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:22,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:04:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:22,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:22,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:04:22,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:22,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:22,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:22,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 20:04:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:22,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425221028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:22,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:22,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:04:22,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787723387] [2021-07-13 20:04:22,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:22,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:22,812 INFO L87 Difference]: Start difference. First operand 9958 states and 44925 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:25,690 INFO L93 Difference]: Finished difference Result 11351 states and 50122 transitions. [2021-07-13 20:04:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:04:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:25,719 INFO L225 Difference]: With dead ends: 11351 [2021-07-13 20:04:25,720 INFO L226 Difference]: Without dead ends: 11143 [2021-07-13 20:04:25,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1903.3ms TimeCoverageRelationStatistics Valid=350, Invalid=2842, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:04:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11143 states. [2021-07-13 20:04:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11143 to 9974. [2021-07-13 20:04:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9974 states, 9973 states have (on average 4.511882081620375) internal successors, (44997), 9973 states have internal predecessors, (44997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9974 states to 9974 states and 44997 transitions. [2021-07-13 20:04:25,930 INFO L78 Accepts]: Start accepts. Automaton has 9974 states and 44997 transitions. Word has length 30 [2021-07-13 20:04:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:25,930 INFO L482 AbstractCegarLoop]: Abstraction has 9974 states and 44997 transitions. [2021-07-13 20:04:25,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9974 states and 44997 transitions. [2021-07-13 20:04:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:25,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:25,949 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:26,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-07-13 20:04:26,150 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:26,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1589296998, now seen corresponding path program 99 times [2021-07-13 20:04:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:26,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584994652] [2021-07-13 20:04:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:26,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:26,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584994652] [2021-07-13 20:04:26,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584994652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:26,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482411455] [2021-07-13 20:04:26,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:26,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:04:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:26,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:26,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:26,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:04:26,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:26,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:26,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:26,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 20:04:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:26,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482411455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:26,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:26,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:04:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44436053] [2021-07-13 20:04:26,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:26,681 INFO L87 Difference]: Start difference. First operand 9974 states and 44997 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:29,801 INFO L93 Difference]: Finished difference Result 11547 states and 51115 transitions. [2021-07-13 20:04:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:04:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:29,831 INFO L225 Difference]: With dead ends: 11547 [2021-07-13 20:04:29,831 INFO L226 Difference]: Without dead ends: 11323 [2021-07-13 20:04:29,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2344.3ms TimeCoverageRelationStatistics Valid=498, Invalid=3662, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:04:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-07-13 20:04:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 9969. [2021-07-13 20:04:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 4.511938202247191) internal successors, (44975), 9968 states have internal predecessors, (44975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 44975 transitions. [2021-07-13 20:04:30,048 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 44975 transitions. Word has length 30 [2021-07-13 20:04:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:30,048 INFO L482 AbstractCegarLoop]: Abstraction has 9969 states and 44975 transitions. [2021-07-13 20:04:30,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 44975 transitions. [2021-07-13 20:04:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:30,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:30,067 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:30,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:30,267 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 20793724, now seen corresponding path program 100 times [2021-07-13 20:04:30,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:30,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469538171] [2021-07-13 20:04:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:30,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:30,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469538171] [2021-07-13 20:04:30,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469538171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:30,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456912989] [2021-07-13 20:04:30,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:30,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:30,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:30,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:30,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:30,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:30,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:30,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:30,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:04:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456912989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:30,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:30,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:04:30,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778664031] [2021-07-13 20:04:30,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:04:30,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:04:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:04:30,717 INFO L87 Difference]: Start difference. First operand 9969 states and 44975 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:31,934 INFO L93 Difference]: Finished difference Result 10654 states and 47622 transitions. [2021-07-13 20:04:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:04:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:31,962 INFO L225 Difference]: With dead ends: 10654 [2021-07-13 20:04:31,962 INFO L226 Difference]: Without dead ends: 10549 [2021-07-13 20:04:31,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 880.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:04:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10549 states. [2021-07-13 20:04:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10549 to 9975. [2021-07-13 20:04:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 4.511830759975937) internal successors, (45001), 9974 states have internal predecessors, (45001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 45001 transitions. [2021-07-13 20:04:32,162 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 45001 transitions. Word has length 30 [2021-07-13 20:04:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:32,162 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 45001 transitions. [2021-07-13 20:04:32,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 45001 transitions. [2021-07-13 20:04:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:32,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:32,252 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:32,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-07-13 20:04:32,452 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash 685196466, now seen corresponding path program 101 times [2021-07-13 20:04:32,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:32,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205139934] [2021-07-13 20:04:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:32,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205139934] [2021-07-13 20:04:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205139934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632829870] [2021-07-13 20:04:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:32,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:04:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:32,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:32,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:04:32,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:32,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:32,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:32,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:183 [2021-07-13 20:04:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:32,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632829870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:32,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:32,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:04:32,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982905555] [2021-07-13 20:04:32,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:32,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:32,960 INFO L87 Difference]: Start difference. First operand 9975 states and 45001 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:34,184 INFO L93 Difference]: Finished difference Result 10772 states and 48198 transitions. [2021-07-13 20:04:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:04:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:34,212 INFO L225 Difference]: With dead ends: 10772 [2021-07-13 20:04:34,212 INFO L226 Difference]: Without dead ends: 10698 [2021-07-13 20:04:34,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 925.3ms TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:04:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10698 states. [2021-07-13 20:04:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10698 to 9975. [2021-07-13 20:04:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 4.511529977942651) internal successors, (44998), 9974 states have internal predecessors, (44998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 44998 transitions. [2021-07-13 20:04:34,413 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 44998 transitions. Word has length 30 [2021-07-13 20:04:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:34,413 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 44998 transitions. [2021-07-13 20:04:34,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 44998 transitions. [2021-07-13 20:04:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:34,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:34,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:34,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:34,632 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2052023334, now seen corresponding path program 102 times [2021-07-13 20:04:34,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:34,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985332645] [2021-07-13 20:04:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:34,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:34,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985332645] [2021-07-13 20:04:34,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985332645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:34,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571447811] [2021-07-13 20:04:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:34,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:34,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:04:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:35,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:04:35,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:35,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:35,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:35,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-07-13 20:04:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571447811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:35,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:35,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:04:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625514553] [2021-07-13 20:04:35,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:04:35,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:35,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:04:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:04:35,193 INFO L87 Difference]: Start difference. First operand 9975 states and 44998 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:35,696 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 20:04:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:38,302 INFO L93 Difference]: Finished difference Result 11004 states and 49170 transitions. [2021-07-13 20:04:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:04:38,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:38,330 INFO L225 Difference]: With dead ends: 11004 [2021-07-13 20:04:38,330 INFO L226 Difference]: Without dead ends: 10903 [2021-07-13 20:04:38,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2455.2ms TimeCoverageRelationStatistics Valid=701, Invalid=4269, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:04:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10903 states. [2021-07-13 20:04:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10903 to 9972. [2021-07-13 20:04:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.511683883261458) internal successors, (44986), 9971 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 44986 transitions. [2021-07-13 20:04:38,535 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 44986 transitions. Word has length 30 [2021-07-13 20:04:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:38,535 INFO L482 AbstractCegarLoop]: Abstraction has 9972 states and 44986 transitions. [2021-07-13 20:04:38,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 44986 transitions. [2021-07-13 20:04:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:38,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:38,554 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:38,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable813 [2021-07-13 20:04:38,754 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash -698006990, now seen corresponding path program 103 times [2021-07-13 20:04:38,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:38,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257634681] [2021-07-13 20:04:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:38,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:38,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257634681] [2021-07-13 20:04:38,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257634681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:38,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528921159] [2021-07-13 20:04:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:39,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:39,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:39,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:39,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:39,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:39,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:39,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:04:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528921159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:39,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:39,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:04:39,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102734788] [2021-07-13 20:04:39,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:39,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:39,164 INFO L87 Difference]: Start difference. First operand 9972 states and 44986 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:42,445 INFO L93 Difference]: Finished difference Result 12450 states and 54844 transitions. [2021-07-13 20:04:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:04:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:42,478 INFO L225 Difference]: With dead ends: 12450 [2021-07-13 20:04:42,479 INFO L226 Difference]: Without dead ends: 12317 [2021-07-13 20:04:42,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 2508.4ms TimeCoverageRelationStatistics Valid=858, Invalid=5148, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:04:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12317 states. [2021-07-13 20:04:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12317 to 9985. [2021-07-13 20:04:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9985 states, 9984 states have (on average 4.51191907051282) internal successors, (45047), 9984 states have internal predecessors, (45047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9985 states to 9985 states and 45047 transitions. [2021-07-13 20:04:42,783 INFO L78 Accepts]: Start accepts. Automaton has 9985 states and 45047 transitions. Word has length 30 [2021-07-13 20:04:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:42,783 INFO L482 AbstractCegarLoop]: Abstraction has 9985 states and 45047 transitions. [2021-07-13 20:04:42,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 9985 states and 45047 transitions. [2021-07-13 20:04:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:42,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:42,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:43,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:43,003 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1837669644, now seen corresponding path program 104 times [2021-07-13 20:04:43,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:43,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55119140] [2021-07-13 20:04:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:43,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:43,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55119140] [2021-07-13 20:04:43,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55119140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:43,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758006183] [2021-07-13 20:04:43,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:43,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:04:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:43,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:43,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:43,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:04:43,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:43,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:43,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:43,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 20:04:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:43,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758006183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:43,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:43,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:04:43,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458694355] [2021-07-13 20:04:43,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:43,607 INFO L87 Difference]: Start difference. First operand 9985 states and 45047 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:45,486 INFO L93 Difference]: Finished difference Result 10767 states and 47887 transitions. [2021-07-13 20:04:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:04:45,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:45,514 INFO L225 Difference]: With dead ends: 10767 [2021-07-13 20:04:45,515 INFO L226 Difference]: Without dead ends: 10585 [2021-07-13 20:04:45,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1365.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:04:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2021-07-13 20:04:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 9978. [2021-07-13 20:04:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9978 states, 9977 states have (on average 4.512679162072767) internal successors, (45023), 9977 states have internal predecessors, (45023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9978 states to 9978 states and 45023 transitions. [2021-07-13 20:04:45,718 INFO L78 Accepts]: Start accepts. Automaton has 9978 states and 45023 transitions. Word has length 30 [2021-07-13 20:04:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:45,719 INFO L482 AbstractCegarLoop]: Abstraction has 9978 states and 45023 transitions. [2021-07-13 20:04:45,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9978 states and 45023 transitions. [2021-07-13 20:04:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:45,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:45,738 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:45,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable819,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:45,938 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -910007654, now seen corresponding path program 90 times [2021-07-13 20:04:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:45,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479049068] [2021-07-13 20:04:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:46,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479049068] [2021-07-13 20:04:46,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479049068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106329521] [2021-07-13 20:04:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:46,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:04:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:46,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:46,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-13 20:04:46,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:46,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:46,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:46,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:356 [2021-07-13 20:04:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:46,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106329521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:46,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:04:46,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117357169] [2021-07-13 20:04:46,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:04:46,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:04:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:04:46,734 INFO L87 Difference]: Start difference. First operand 9978 states and 45023 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:48,102 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-13 20:04:48,243 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-13 20:04:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:48,822 INFO L93 Difference]: Finished difference Result 10678 states and 47862 transitions. [2021-07-13 20:04:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:04:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:48,850 INFO L225 Difference]: With dead ends: 10678 [2021-07-13 20:04:48,851 INFO L226 Difference]: Without dead ends: 10589 [2021-07-13 20:04:48,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1778.7ms TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:04:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10589 states. [2021-07-13 20:04:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10589 to 9990. [2021-07-13 20:04:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9990 states, 9989 states have (on average 4.512563820202223) internal successors, (45076), 9989 states have internal predecessors, (45076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9990 states to 9990 states and 45076 transitions. [2021-07-13 20:04:49,059 INFO L78 Accepts]: Start accepts. Automaton has 9990 states and 45076 transitions. Word has length 30 [2021-07-13 20:04:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:49,059 INFO L482 AbstractCegarLoop]: Abstraction has 9990 states and 45076 transitions. [2021-07-13 20:04:49,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 9990 states and 45076 transitions. [2021-07-13 20:04:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:49,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:49,079 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:49,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:49,279 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:49,279 INFO L82 PathProgramCache]: Analyzing trace with hash -522448212, now seen corresponding path program 91 times [2021-07-13 20:04:49,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:49,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705106406] [2021-07-13 20:04:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:49,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:49,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705106406] [2021-07-13 20:04:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705106406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:49,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19734374] [2021-07-13 20:04:49,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:49,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:49,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:49,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:49,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:49,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:49,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:49,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:04:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:49,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19734374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:49,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:49,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:04:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930230748] [2021-07-13 20:04:49,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:49,799 INFO L87 Difference]: Start difference. First operand 9990 states and 45076 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:51,267 INFO L93 Difference]: Finished difference Result 10632 states and 47584 transitions. [2021-07-13 20:04:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:04:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:51,296 INFO L225 Difference]: With dead ends: 10632 [2021-07-13 20:04:51,296 INFO L226 Difference]: Without dead ends: 10527 [2021-07-13 20:04:51,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1094.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:04:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-07-13 20:04:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 9986. [2021-07-13 20:04:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 4.512969454181272) internal successors, (45062), 9985 states have internal predecessors, (45062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 45062 transitions. [2021-07-13 20:04:51,505 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 45062 transitions. Word has length 30 [2021-07-13 20:04:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:51,506 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 45062 transitions. [2021-07-13 20:04:51,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 45062 transitions. [2021-07-13 20:04:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:51,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:51,525 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:51,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:51,725 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1366292672, now seen corresponding path program 92 times [2021-07-13 20:04:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:51,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471244131] [2021-07-13 20:04:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:51,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471244131] [2021-07-13 20:04:51,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471244131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112105671] [2021-07-13 20:04:51,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:51,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:51,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:51,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:04:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:52,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:52,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:52,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:04:52,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:52,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:52,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:52,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 20:04:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:52,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112105671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:52,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:52,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:04:52,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058339638] [2021-07-13 20:04:52,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:04:52,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:04:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:04:52,162 INFO L87 Difference]: Start difference. First operand 9986 states and 45062 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:53,570 INFO L93 Difference]: Finished difference Result 11326 states and 50192 transitions. [2021-07-13 20:04:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:04:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:53,600 INFO L225 Difference]: With dead ends: 11326 [2021-07-13 20:04:53,600 INFO L226 Difference]: Without dead ends: 11237 [2021-07-13 20:04:53,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1086.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:04:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11237 states. [2021-07-13 20:04:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11237 to 9993. [2021-07-13 20:04:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9993 states, 9992 states have (on average 4.512710168134507) internal successors, (45091), 9992 states have internal predecessors, (45091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 45091 transitions. [2021-07-13 20:04:53,820 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 45091 transitions. Word has length 30 [2021-07-13 20:04:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:53,821 INFO L482 AbstractCegarLoop]: Abstraction has 9993 states and 45091 transitions. [2021-07-13 20:04:53,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 45091 transitions. [2021-07-13 20:04:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:53,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:53,839 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:54,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-07-13 20:04:54,040 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:54,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1817149292, now seen corresponding path program 93 times [2021-07-13 20:04:54,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:54,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347408737] [2021-07-13 20:04:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:54,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347408737] [2021-07-13 20:04:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347408737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988736452] [2021-07-13 20:04:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:54,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:04:54,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:54,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:54,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:54,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:04:54,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:54,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:54,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:54,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 20:04:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988736452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:54,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:54,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:04:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287465135] [2021-07-13 20:04:54,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:54,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:54,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:54,530 INFO L87 Difference]: Start difference. First operand 9993 states and 45091 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:56,682 INFO L93 Difference]: Finished difference Result 11584 states and 51228 transitions. [2021-07-13 20:04:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:04:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:56,712 INFO L225 Difference]: With dead ends: 11584 [2021-07-13 20:04:56,712 INFO L226 Difference]: Without dead ends: 11402 [2021-07-13 20:04:56,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1626.9ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:04:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-07-13 20:04:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 9990. [2021-07-13 20:04:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9990 states, 9989 states have (on average 4.512764040444489) internal successors, (45078), 9989 states have internal predecessors, (45078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9990 states to 9990 states and 45078 transitions. [2021-07-13 20:04:56,929 INFO L78 Accepts]: Start accepts. Automaton has 9990 states and 45078 transitions. Word has length 30 [2021-07-13 20:04:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:56,929 INFO L482 AbstractCegarLoop]: Abstraction has 9990 states and 45078 transitions. [2021-07-13 20:04:56,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 9990 states and 45078 transitions. [2021-07-13 20:04:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:56,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:56,949 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:57,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-07-13 20:04:57,149 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash 386556672, now seen corresponding path program 94 times [2021-07-13 20:04:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197465213] [2021-07-13 20:04:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:57,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:57,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197465213] [2021-07-13 20:04:57,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197465213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138722027] [2021-07-13 20:04:57,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:57,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:57,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:57,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:57,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:57,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:57,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:57,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:57,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:04:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138722027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:57,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-13 20:04:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867570366] [2021-07-13 20:04:57,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:04:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:57,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:04:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:04:57,528 INFO L87 Difference]: Start difference. First operand 9990 states and 45078 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:59,060 INFO L93 Difference]: Finished difference Result 11415 states and 50521 transitions. [2021-07-13 20:04:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:04:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:04:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:59,091 INFO L225 Difference]: With dead ends: 11415 [2021-07-13 20:04:59,091 INFO L226 Difference]: Without dead ends: 11326 [2021-07-13 20:04:59,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1062.8ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:04:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2021-07-13 20:04:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 10000. [2021-07-13 20:04:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 9999 states have (on average 4.513351335133513) internal successors, (45129), 9999 states have internal predecessors, (45129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 45129 transitions. [2021-07-13 20:04:59,315 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 45129 transitions. Word has length 30 [2021-07-13 20:04:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:59,315 INFO L482 AbstractCegarLoop]: Abstraction has 10000 states and 45129 transitions. [2021-07-13 20:04:59,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 45129 transitions. [2021-07-13 20:04:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:04:59,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:59,334 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:59,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable845 [2021-07-13 20:04:59,534 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash 134499218, now seen corresponding path program 95 times [2021-07-13 20:04:59,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:59,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867157713] [2021-07-13 20:04:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:59,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:59,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867157713] [2021-07-13 20:04:59,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867157713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:59,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648088487] [2021-07-13 20:04:59,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:59,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:59,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:59,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:04:59,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:59,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:04:59,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:59,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:04:59,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:04:59,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:04:59,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:04:59,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:04:59,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:04:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:59,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648088487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:59,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:59,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-07-13 20:04:59,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919782591] [2021-07-13 20:04:59,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:04:59,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:04:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:04:59,982 INFO L87 Difference]: Start difference. First operand 10000 states and 45129 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:01,254 INFO L93 Difference]: Finished difference Result 11097 states and 49386 transitions. [2021-07-13 20:05:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:01,284 INFO L225 Difference]: With dead ends: 11097 [2021-07-13 20:05:01,285 INFO L226 Difference]: Without dead ends: 11021 [2021-07-13 20:05:01,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:05:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11021 states. [2021-07-13 20:05:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11021 to 9995. [2021-07-13 20:05:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9995 states, 9994 states have (on average 4.512907744646788) internal successors, (45102), 9994 states have internal predecessors, (45102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9995 states to 9995 states and 45102 transitions. [2021-07-13 20:05:01,518 INFO L78 Accepts]: Start accepts. Automaton has 9995 states and 45102 transitions. Word has length 30 [2021-07-13 20:05:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:01,519 INFO L482 AbstractCegarLoop]: Abstraction has 9995 states and 45102 transitions. [2021-07-13 20:05:01,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9995 states and 45102 transitions. [2021-07-13 20:05:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:01,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:01,538 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:01,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:01,739 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash -417734958, now seen corresponding path program 96 times [2021-07-13 20:05:01,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:01,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261167828] [2021-07-13 20:05:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261167828] [2021-07-13 20:05:01,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261167828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389624555] [2021-07-13 20:05:01,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:01,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:05:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:05:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:05:02,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-13 20:05:02,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:02,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:02,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:02,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-07-13 20:05:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389624555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:02,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:05:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108377465] [2021-07-13 20:05:02,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:05:02,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:05:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:02,192 INFO L87 Difference]: Start difference. First operand 9995 states and 45102 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:04,572 INFO L93 Difference]: Finished difference Result 12330 states and 54270 transitions. [2021-07-13 20:05:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:05:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:04,606 INFO L225 Difference]: With dead ends: 12330 [2021-07-13 20:05:04,606 INFO L226 Difference]: Without dead ends: 12221 [2021-07-13 20:05:04,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1832.0ms TimeCoverageRelationStatistics Valid=812, Invalid=4300, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:05:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2021-07-13 20:05:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 10001. [2021-07-13 20:05:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 10000 states have (on average 4.5119) internal successors, (45119), 10000 states have internal predecessors, (45119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 45119 transitions. [2021-07-13 20:05:04,841 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 45119 transitions. Word has length 30 [2021-07-13 20:05:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:04,841 INFO L482 AbstractCegarLoop]: Abstraction has 10001 states and 45119 transitions. [2021-07-13 20:05:04,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 45119 transitions. [2021-07-13 20:05:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:04,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:04,861 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:05,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-07-13 20:05:05,062 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1054201812, now seen corresponding path program 97 times [2021-07-13 20:05:05,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:05,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994996119] [2021-07-13 20:05:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:05,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994996119] [2021-07-13 20:05:05,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994996119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086797599] [2021-07-13 20:05:05,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:05,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:05,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:05:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:05:05,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:05:05,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:05,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:05,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:05,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-07-13 20:05:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086797599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:05,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:05:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486033340] [2021-07-13 20:05:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:05,447 INFO L87 Difference]: Start difference. First operand 10001 states and 45119 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:08,497 INFO L93 Difference]: Finished difference Result 12898 states and 56326 transitions. [2021-07-13 20:05:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:05:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:08,533 INFO L225 Difference]: With dead ends: 12898 [2021-07-13 20:05:08,533 INFO L226 Difference]: Without dead ends: 12761 [2021-07-13 20:05:08,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 2105.8ms TimeCoverageRelationStatistics Valid=935, Invalid=4917, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:05:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12761 states. [2021-07-13 20:05:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12761 to 9990. [2021-07-13 20:05:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9990 states, 9989 states have (on average 4.512263489838823) internal successors, (45073), 9989 states have internal predecessors, (45073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9990 states to 9990 states and 45073 transitions. [2021-07-13 20:05:08,785 INFO L78 Accepts]: Start accepts. Automaton has 9990 states and 45073 transitions. Word has length 30 [2021-07-13 20:05:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:08,786 INFO L482 AbstractCegarLoop]: Abstraction has 9990 states and 45073 transitions. [2021-07-13 20:05:08,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 9990 states and 45073 transitions. [2021-07-13 20:05:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:08,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:08,805 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:09,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-07-13 20:05:09,006 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2077985798, now seen corresponding path program 17 times [2021-07-13 20:05:09,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:09,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209652967] [2021-07-13 20:05:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:09,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209652967] [2021-07-13 20:05:09,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209652967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913989402] [2021-07-13 20:05:09,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:09,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:09,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:09,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:09,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:09,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:09,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:09,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 20:05:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913989402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:09,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:05:09,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985020746] [2021-07-13 20:05:09,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:09,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:09,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:09,356 INFO L87 Difference]: Start difference. First operand 9990 states and 45073 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:10,605 INFO L93 Difference]: Finished difference Result 11329 states and 50509 transitions. [2021-07-13 20:05:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:05:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:10,636 INFO L225 Difference]: With dead ends: 11329 [2021-07-13 20:05:10,636 INFO L226 Difference]: Without dead ends: 11247 [2021-07-13 20:05:10,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 878.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:05:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11247 states. [2021-07-13 20:05:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11247 to 10021. [2021-07-13 20:05:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10021 states, 10020 states have (on average 4.511477045908183) internal successors, (45205), 10020 states have internal predecessors, (45205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10021 states to 10021 states and 45205 transitions. [2021-07-13 20:05:10,856 INFO L78 Accepts]: Start accepts. Automaton has 10021 states and 45205 transitions. Word has length 30 [2021-07-13 20:05:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:10,856 INFO L482 AbstractCegarLoop]: Abstraction has 10021 states and 45205 transitions. [2021-07-13 20:05:10,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10021 states and 45205 transitions. [2021-07-13 20:05:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:10,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:10,875 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:11,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:11,075 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1140721598, now seen corresponding path program 18 times [2021-07-13 20:05:11,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:11,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271250044] [2021-07-13 20:05:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:11,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271250044] [2021-07-13 20:05:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271250044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501379470] [2021-07-13 20:05:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:11,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:11,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:11,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:11,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 20:05:11,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:11,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:11,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:11,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:36 [2021-07-13 20:05:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501379470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:11,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:05:11,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777659218] [2021-07-13 20:05:11,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:11,543 INFO L87 Difference]: Start difference. First operand 10021 states and 45205 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:13,772 INFO L93 Difference]: Finished difference Result 11188 states and 49704 transitions. [2021-07-13 20:05:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:05:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:13,805 INFO L225 Difference]: With dead ends: 11188 [2021-07-13 20:05:13,805 INFO L226 Difference]: Without dead ends: 11036 [2021-07-13 20:05:13,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1561.3ms TimeCoverageRelationStatistics Valid=435, Invalid=3225, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:05:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11036 states. [2021-07-13 20:05:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11036 to 10024. [2021-07-13 20:05:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 4.511124413848149) internal successors, (45215), 10023 states have internal predecessors, (45215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 45215 transitions. [2021-07-13 20:05:14,042 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 45215 transitions. Word has length 30 [2021-07-13 20:05:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:14,042 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 45215 transitions. [2021-07-13 20:05:14,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 45215 transitions. [2021-07-13 20:05:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:14,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:14,062 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:14,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-07-13 20:05:14,263 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash -922992324, now seen corresponding path program 98 times [2021-07-13 20:05:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:14,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066262064] [2021-07-13 20:05:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:14,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066262064] [2021-07-13 20:05:14,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066262064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63370962] [2021-07-13 20:05:14,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:14,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:14,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:14,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:14,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:14,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:14,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-07-13 20:05:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63370962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:14,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:05:14,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131725691] [2021-07-13 20:05:14,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:14,592 INFO L87 Difference]: Start difference. First operand 10024 states and 45215 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:16,269 INFO L93 Difference]: Finished difference Result 11202 states and 50017 transitions. [2021-07-13 20:05:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:16,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:16,302 INFO L225 Difference]: With dead ends: 11202 [2021-07-13 20:05:16,302 INFO L226 Difference]: Without dead ends: 11129 [2021-07-13 20:05:16,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1163.4ms TimeCoverageRelationStatistics Valid=333, Invalid=1737, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:05:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2021-07-13 20:05:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 10057. [2021-07-13 20:05:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10057 states, 10056 states have (on average 4.511038186157518) internal successors, (45363), 10056 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 45363 transitions. [2021-07-13 20:05:16,539 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 45363 transitions. Word has length 30 [2021-07-13 20:05:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:16,539 INFO L482 AbstractCegarLoop]: Abstraction has 10057 states and 45363 transitions. [2021-07-13 20:05:16,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 45363 transitions. [2021-07-13 20:05:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:16,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:16,560 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:16,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:16,760 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 603078754, now seen corresponding path program 99 times [2021-07-13 20:05:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:16,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406920708] [2021-07-13 20:05:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:16,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:16,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406920708] [2021-07-13 20:05:16,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406920708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:16,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154873689] [2021-07-13 20:05:16,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:17,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:05:17,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:17,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:05:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:17,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:05:17,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:17,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:17,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:17,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-13 20:05:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:17,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154873689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:17,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:17,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:05:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224546964] [2021-07-13 20:05:17,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:17,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:17,217 INFO L87 Difference]: Start difference. First operand 10057 states and 45363 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:18,589 INFO L93 Difference]: Finished difference Result 11134 states and 49756 transitions. [2021-07-13 20:05:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:05:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:18,619 INFO L225 Difference]: With dead ends: 11134 [2021-07-13 20:05:18,619 INFO L226 Difference]: Without dead ends: 11051 [2021-07-13 20:05:18,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1183.1ms TimeCoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:05:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2021-07-13 20:05:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 10050. [2021-07-13 20:05:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10050 states, 10049 states have (on average 4.510598069459648) internal successors, (45327), 10049 states have internal predecessors, (45327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10050 states to 10050 states and 45327 transitions. [2021-07-13 20:05:18,844 INFO L78 Accepts]: Start accepts. Automaton has 10050 states and 45327 transitions. Word has length 30 [2021-07-13 20:05:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 10050 states and 45327 transitions. [2021-07-13 20:05:18,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10050 states and 45327 transitions. [2021-07-13 20:05:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:18,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:18,863 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:19,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-07-13 20:05:19,064 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1813102464, now seen corresponding path program 100 times [2021-07-13 20:05:19,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:19,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622344694] [2021-07-13 20:05:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622344694] [2021-07-13 20:05:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622344694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308570248] [2021-07-13 20:05:19,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:19,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:19,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:19,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:19,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:19,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:19,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:19,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-07-13 20:05:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308570248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:19,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:05:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560947500] [2021-07-13 20:05:19,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:05:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:05:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:19,390 INFO L87 Difference]: Start difference. First operand 10050 states and 45327 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:21,511 INFO L93 Difference]: Finished difference Result 11785 states and 52347 transitions. [2021-07-13 20:05:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:21,543 INFO L225 Difference]: With dead ends: 11785 [2021-07-13 20:05:21,544 INFO L226 Difference]: Without dead ends: 11633 [2021-07-13 20:05:21,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1391.8ms TimeCoverageRelationStatistics Valid=445, Invalid=2417, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:05:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11633 states. [2021-07-13 20:05:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11633 to 10087. [2021-07-13 20:05:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 4.509220701963117) internal successors, (45480), 10086 states have internal predecessors, (45480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 45480 transitions. [2021-07-13 20:05:21,787 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 45480 transitions. Word has length 30 [2021-07-13 20:05:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:21,787 INFO L482 AbstractCegarLoop]: Abstraction has 10087 states and 45480 transitions. [2021-07-13 20:05:21,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 45480 transitions. [2021-07-13 20:05:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:21,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:21,808 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:22,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-07-13 20:05:22,009 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -947447012, now seen corresponding path program 19 times [2021-07-13 20:05:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:22,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825145642] [2021-07-13 20:05:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825145642] [2021-07-13 20:05:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825145642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514717284] [2021-07-13 20:05:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:22,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:22,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:22,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:22,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:22,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:22,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:22,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 20:05:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514717284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:22,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:22,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642412718] [2021-07-13 20:05:22,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:22,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:22,378 INFO L87 Difference]: Start difference. First operand 10087 states and 45480 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:23,963 INFO L93 Difference]: Finished difference Result 11775 states and 52246 transitions. [2021-07-13 20:05:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:05:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:23,996 INFO L225 Difference]: With dead ends: 11775 [2021-07-13 20:05:23,997 INFO L226 Difference]: Without dead ends: 11623 [2021-07-13 20:05:23,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1010.2ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:05:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11623 states. [2021-07-13 20:05:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11623 to 10083. [2021-07-13 20:05:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10083 states, 10082 states have (on average 4.509422733584606) internal successors, (45464), 10082 states have internal predecessors, (45464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10083 states to 10083 states and 45464 transitions. [2021-07-13 20:05:24,223 INFO L78 Accepts]: Start accepts. Automaton has 10083 states and 45464 transitions. Word has length 30 [2021-07-13 20:05:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:24,223 INFO L482 AbstractCegarLoop]: Abstraction has 10083 states and 45464 transitions. [2021-07-13 20:05:24,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 10083 states and 45464 transitions. [2021-07-13 20:05:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:24,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:24,244 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:24,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-07-13 20:05:24,444 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:24,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1280388246, now seen corresponding path program 101 times [2021-07-13 20:05:24,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:24,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186930723] [2021-07-13 20:05:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:24,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:24,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186930723] [2021-07-13 20:05:24,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186930723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:24,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219943500] [2021-07-13 20:05:24,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:24,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:24,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:24,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:24,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:24,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:24,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:05:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:24,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219943500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:24,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:24,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:05:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910492699] [2021-07-13 20:05:24,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:24,768 INFO L87 Difference]: Start difference. First operand 10083 states and 45464 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:25,957 INFO L93 Difference]: Finished difference Result 11215 states and 50074 transitions. [2021-07-13 20:05:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:05:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:25,988 INFO L225 Difference]: With dead ends: 11215 [2021-07-13 20:05:25,989 INFO L226 Difference]: Without dead ends: 11142 [2021-07-13 20:05:25,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:05:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2021-07-13 20:05:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 10097. [2021-07-13 20:05:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.509904912836767) internal successors, (45532), 10096 states have internal predecessors, (45532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45532 transitions. [2021-07-13 20:05:26,219 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45532 transitions. Word has length 30 [2021-07-13 20:05:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:26,219 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45532 transitions. [2021-07-13 20:05:26,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45532 transitions. [2021-07-13 20:05:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:26,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:26,239 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:26,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-07-13 20:05:26,440 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1488507972, now seen corresponding path program 102 times [2021-07-13 20:05:26,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:26,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579041415] [2021-07-13 20:05:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:26,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:26,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579041415] [2021-07-13 20:05:26,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579041415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:26,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809285323] [2021-07-13 20:05:26,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:26,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:05:26,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:05:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:26,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:26,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:05:26,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:26,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:26,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:26,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:05:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:26,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809285323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:26,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:26,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:05:26,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488677406] [2021-07-13 20:05:26,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:26,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:26,798 INFO L87 Difference]: Start difference. First operand 10097 states and 45532 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:28,091 INFO L93 Difference]: Finished difference Result 11043 states and 49356 transitions. [2021-07-13 20:05:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:05:28,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:28,122 INFO L225 Difference]: With dead ends: 11043 [2021-07-13 20:05:28,122 INFO L226 Difference]: Without dead ends: 10967 [2021-07-13 20:05:28,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 932.5ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:05:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2021-07-13 20:05:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10092. [2021-07-13 20:05:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10092 states, 10091 states have (on average 4.509364780497473) internal successors, (45504), 10091 states have internal predecessors, (45504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10092 states to 10092 states and 45504 transitions. [2021-07-13 20:05:28,348 INFO L78 Accepts]: Start accepts. Automaton has 10092 states and 45504 transitions. Word has length 30 [2021-07-13 20:05:28,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:28,349 INFO L482 AbstractCegarLoop]: Abstraction has 10092 states and 45504 transitions. [2021-07-13 20:05:28,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 10092 states and 45504 transitions. [2021-07-13 20:05:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:28,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:28,369 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:28,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:28,569 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash -10353760, now seen corresponding path program 103 times [2021-07-13 20:05:28,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:28,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842976131] [2021-07-13 20:05:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:28,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842976131] [2021-07-13 20:05:28,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842976131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795131618] [2021-07-13 20:05:28,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:28,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:28,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:28,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:28,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:05:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:28,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795131618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:28,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:28,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:05:28,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584291698] [2021-07-13 20:05:28,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:05:28,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:28,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:05:28,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:28,898 INFO L87 Difference]: Start difference. First operand 10092 states and 45504 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:30,157 INFO L93 Difference]: Finished difference Result 11299 states and 50454 transitions. [2021-07-13 20:05:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:05:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:30,190 INFO L225 Difference]: With dead ends: 11299 [2021-07-13 20:05:30,190 INFO L226 Difference]: Without dead ends: 11228 [2021-07-13 20:05:30,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 918.1ms TimeCoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:05:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2021-07-13 20:05:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 10092. [2021-07-13 20:05:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10092 states, 10091 states have (on average 4.509364780497473) internal successors, (45504), 10091 states have internal predecessors, (45504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10092 states to 10092 states and 45504 transitions. [2021-07-13 20:05:30,465 INFO L78 Accepts]: Start accepts. Automaton has 10092 states and 45504 transitions. Word has length 30 [2021-07-13 20:05:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:30,465 INFO L482 AbstractCegarLoop]: Abstraction has 10092 states and 45504 transitions. [2021-07-13 20:05:30,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 10092 states and 45504 transitions. [2021-07-13 20:05:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:30,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:30,485 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:30,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-07-13 20:05:30,685 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1270215044, now seen corresponding path program 104 times [2021-07-13 20:05:30,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:30,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262747723] [2021-07-13 20:05:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:30,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:30,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262747723] [2021-07-13 20:05:30,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262747723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:30,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196131722] [2021-07-13 20:05:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:30,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:30,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:30,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:30,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:30,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:30,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:30,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:05:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196131722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:31,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:31,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:05:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146579789] [2021-07-13 20:05:31,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:31,004 INFO L87 Difference]: Start difference. First operand 10092 states and 45504 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:32,143 INFO L93 Difference]: Finished difference Result 11239 states and 50158 transitions. [2021-07-13 20:05:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:05:32,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:32,173 INFO L225 Difference]: With dead ends: 11239 [2021-07-13 20:05:32,173 INFO L226 Difference]: Without dead ends: 11166 [2021-07-13 20:05:32,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:05:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11166 states. [2021-07-13 20:05:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11166 to 10101. [2021-07-13 20:05:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10101 states, 10100 states have (on average 4.509702970297029) internal successors, (45548), 10100 states have internal predecessors, (45548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10101 states to 10101 states and 45548 transitions. [2021-07-13 20:05:32,400 INFO L78 Accepts]: Start accepts. Automaton has 10101 states and 45548 transitions. Word has length 30 [2021-07-13 20:05:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:32,400 INFO L482 AbstractCegarLoop]: Abstraction has 10101 states and 45548 transitions. [2021-07-13 20:05:32,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10101 states and 45548 transitions. [2021-07-13 20:05:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:32,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:32,420 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:32,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:32,620 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -649730978, now seen corresponding path program 105 times [2021-07-13 20:05:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:32,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385506413] [2021-07-13 20:05:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:32,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385506413] [2021-07-13 20:05:32,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385506413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728141646] [2021-07-13 20:05:32,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:32,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:32,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:05:32,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:32,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:32,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-13 20:05:32,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:32,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:32,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:32,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-13 20:05:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:33,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728141646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:33,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:33,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:05:33,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722793120] [2021-07-13 20:05:33,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:33,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:33,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:33,022 INFO L87 Difference]: Start difference. First operand 10101 states and 45548 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:33,485 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 20:05:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:34,647 INFO L93 Difference]: Finished difference Result 11438 states and 50722 transitions. [2021-07-13 20:05:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:05:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:34,679 INFO L225 Difference]: With dead ends: 11438 [2021-07-13 20:05:34,679 INFO L226 Difference]: Without dead ends: 11265 [2021-07-13 20:05:34,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1221.8ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:05:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-07-13 20:05:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10097. [2021-07-13 20:05:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.509508716323296) internal successors, (45528), 10096 states have internal predecessors, (45528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45528 transitions. [2021-07-13 20:05:34,904 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45528 transitions. Word has length 30 [2021-07-13 20:05:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:34,904 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45528 transitions. [2021-07-13 20:05:34,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45528 transitions. [2021-07-13 20:05:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:34,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:34,924 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:35,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:35,124 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 121531678, now seen corresponding path program 106 times [2021-07-13 20:05:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259069494] [2021-07-13 20:05:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:35,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259069494] [2021-07-13 20:05:35,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259069494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091308157] [2021-07-13 20:05:35,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:35,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:35,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:05:35,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:35,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:35,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:35,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-13 20:05:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:35,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091308157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:35,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:35,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:05:35,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787833704] [2021-07-13 20:05:35,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:05:35,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:05:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:35,450 INFO L87 Difference]: Start difference. First operand 10097 states and 45528 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:36,792 INFO L93 Difference]: Finished difference Result 11327 states and 50569 transitions. [2021-07-13 20:05:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:05:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:36,822 INFO L225 Difference]: With dead ends: 11327 [2021-07-13 20:05:36,822 INFO L226 Difference]: Without dead ends: 11256 [2021-07-13 20:05:36,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 942.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:05:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-07-13 20:05:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 10097. [2021-07-13 20:05:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.509508716323296) internal successors, (45528), 10096 states have internal predecessors, (45528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45528 transitions. [2021-07-13 20:05:37,084 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45528 transitions. Word has length 30 [2021-07-13 20:05:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:37,085 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45528 transitions. [2021-07-13 20:05:37,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45528 transitions. [2021-07-13 20:05:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:37,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:37,104 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:37,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-07-13 20:05:37,305 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash -514935176, now seen corresponding path program 107 times [2021-07-13 20:05:37,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:37,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615776708] [2021-07-13 20:05:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:37,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:37,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615776708] [2021-07-13 20:05:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615776708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:37,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459673874] [2021-07-13 20:05:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:37,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:37,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:05:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:37,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-07-13 20:05:37,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:37,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:37,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:37,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:1726 [2021-07-13 20:05:38,289 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 58 [2021-07-13 20:05:38,451 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-07-13 20:05:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459673874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:38,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:38,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:05:38,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049346525] [2021-07-13 20:05:38,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:38,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:38,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:38,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:38,594 INFO L87 Difference]: Start difference. First operand 10097 states and 45528 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:39,072 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-13 20:05:39,730 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 39 [2021-07-13 20:05:40,062 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:05:40,207 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 20:05:40,358 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2021-07-13 20:05:41,070 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-07-13 20:05:41,536 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2021-07-13 20:05:41,779 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 39 [2021-07-13 20:05:41,949 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-07-13 20:05:42,119 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-13 20:05:42,350 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:05:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:42,945 INFO L93 Difference]: Finished difference Result 11737 states and 51882 transitions. [2021-07-13 20:05:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:05:42,946 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:42,978 INFO L225 Difference]: With dead ends: 11737 [2021-07-13 20:05:42,978 INFO L226 Difference]: Without dead ends: 11538 [2021-07-13 20:05:42,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 4183.4ms TimeCoverageRelationStatistics Valid=748, Invalid=3158, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:05:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11538 states. [2021-07-13 20:05:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11538 to 10094. [2021-07-13 20:05:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.509561081937977) internal successors, (45515), 10093 states have internal predecessors, (45515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45515 transitions. [2021-07-13 20:05:43,206 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45515 transitions. Word has length 30 [2021-07-13 20:05:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:43,206 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45515 transitions. [2021-07-13 20:05:43,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45515 transitions. [2021-07-13 20:05:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:43,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:43,287 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:43,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-07-13 20:05:43,488 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:43,488 INFO L82 PathProgramCache]: Analyzing trace with hash -75035936, now seen corresponding path program 108 times [2021-07-13 20:05:43,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:43,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307883165] [2021-07-13 20:05:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:43,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307883165] [2021-07-13 20:05:43,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307883165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598093927] [2021-07-13 20:05:43,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:43,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:43,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:43,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:05:43,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:05:43,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-07-13 20:05:43,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:05:43,888 INFO L628 ElimStorePlain]: treesize reduction 29, result has 46.3 percent of original size [2021-07-13 20:05:43,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:43,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:22 [2021-07-13 20:05:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:43,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598093927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:43,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:43,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:05:43,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733562807] [2021-07-13 20:05:43,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:43,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:43,961 INFO L87 Difference]: Start difference. First operand 10094 states and 45515 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:46,046 INFO L93 Difference]: Finished difference Result 11776 states and 52044 transitions. [2021-07-13 20:05:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:05:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:46,080 INFO L225 Difference]: With dead ends: 11776 [2021-07-13 20:05:46,080 INFO L226 Difference]: Without dead ends: 11488 [2021-07-13 20:05:46,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1432.7ms TimeCoverageRelationStatistics Valid=453, Invalid=2969, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:05:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11488 states. [2021-07-13 20:05:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11488 to 10094. [2021-07-13 20:05:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.509561081937977) internal successors, (45515), 10093 states have internal predecessors, (45515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45515 transitions. [2021-07-13 20:05:46,314 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45515 transitions. Word has length 30 [2021-07-13 20:05:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:46,314 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45515 transitions. [2021-07-13 20:05:46,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45515 transitions. [2021-07-13 20:05:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:46,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:46,335 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:46,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable911 [2021-07-13 20:05:46,536 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 790619516, now seen corresponding path program 20 times [2021-07-13 20:05:46,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:46,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78473713] [2021-07-13 20:05:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:46,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:46,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78473713] [2021-07-13 20:05:46,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78473713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:46,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565328123] [2021-07-13 20:05:46,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:46,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:46,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:46,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:46,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:46,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:46,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-13 20:05:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:46,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565328123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:46,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:46,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:05:46,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210926473] [2021-07-13 20:05:46,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:46,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:46,975 INFO L87 Difference]: Start difference. First operand 10094 states and 45515 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:48,387 INFO L93 Difference]: Finished difference Result 11737 states and 52084 transitions. [2021-07-13 20:05:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:05:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:48,421 INFO L225 Difference]: With dead ends: 11737 [2021-07-13 20:05:48,421 INFO L226 Difference]: Without dead ends: 11585 [2021-07-13 20:05:48,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 908.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:05:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2021-07-13 20:05:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 10118. [2021-07-13 20:05:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10118 states, 10117 states have (on average 4.5085499654047645) internal successors, (45613), 10117 states have internal predecessors, (45613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10118 states to 10118 states and 45613 transitions. [2021-07-13 20:05:48,659 INFO L78 Accepts]: Start accepts. Automaton has 10118 states and 45613 transitions. Word has length 30 [2021-07-13 20:05:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 10118 states and 45613 transitions. [2021-07-13 20:05:48,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 10118 states and 45613 transitions. [2021-07-13 20:05:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:48,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:48,679 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:48,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:48,879 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -343782364, now seen corresponding path program 109 times [2021-07-13 20:05:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:48,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654997173] [2021-07-13 20:05:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:49,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654997173] [2021-07-13 20:05:49,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654997173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625781953] [2021-07-13 20:05:49,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:49,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:49,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:49,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:49,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:49,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:05:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625781953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:49,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:05:49,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251107784] [2021-07-13 20:05:49,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:05:49,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:05:49,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:49,213 INFO L87 Difference]: Start difference. First operand 10118 states and 45613 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:50,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:50,648 INFO L93 Difference]: Finished difference Result 11383 states and 50815 transitions. [2021-07-13 20:05:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:05:50,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:50,681 INFO L225 Difference]: With dead ends: 11383 [2021-07-13 20:05:50,681 INFO L226 Difference]: Without dead ends: 11302 [2021-07-13 20:05:50,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:05:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11302 states. [2021-07-13 20:05:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11302 to 10118. [2021-07-13 20:05:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10118 states, 10117 states have (on average 4.5085499654047645) internal successors, (45613), 10117 states have internal predecessors, (45613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10118 states to 10118 states and 45613 transitions. [2021-07-13 20:05:50,906 INFO L78 Accepts]: Start accepts. Automaton has 10118 states and 45613 transitions. Word has length 30 [2021-07-13 20:05:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:50,906 INFO L482 AbstractCegarLoop]: Abstraction has 10118 states and 45613 transitions. [2021-07-13 20:05:50,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 10118 states and 45613 transitions. [2021-07-13 20:05:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:50,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:50,926 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:51,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:51,129 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash -980249218, now seen corresponding path program 110 times [2021-07-13 20:05:51,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:51,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646623089] [2021-07-13 20:05:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:51,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:51,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646623089] [2021-07-13 20:05:51,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646623089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:51,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656359488] [2021-07-13 20:05:51,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:51,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:51,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:51,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:05:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:51,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-13 20:05:51,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:05:51,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:05:51,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:05:51,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-13 20:05:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656359488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:51,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:51,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:05:51,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533865164] [2021-07-13 20:05:51,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:05:51,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:05:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:51,458 INFO L87 Difference]: Start difference. First operand 10118 states and 45613 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:52,922 INFO L93 Difference]: Finished difference Result 11452 states and 51070 transitions. [2021-07-13 20:05:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:05:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:05:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:52,954 INFO L225 Difference]: With dead ends: 11452 [2021-07-13 20:05:52,954 INFO L226 Difference]: Without dead ends: 11372 [2021-07-13 20:05:52,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:05:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11372 states. [2021-07-13 20:05:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11372 to 10090. [2021-07-13 20:05:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10090 states, 10089 states have (on average 4.509763108335811) internal successors, (45499), 10089 states have internal predecessors, (45499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10090 states to 10090 states and 45499 transitions. [2021-07-13 20:05:53,191 INFO L78 Accepts]: Start accepts. Automaton has 10090 states and 45499 transitions. Word has length 30 [2021-07-13 20:05:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:53,191 INFO L482 AbstractCegarLoop]: Abstraction has 10090 states and 45499 transitions. [2021-07-13 20:05:53,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 10090 states and 45499 transitions. [2021-07-13 20:05:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:05:53,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:53,214 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:53,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:53,414 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1352137914, now seen corresponding path program 10 times [2021-07-13 20:05:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:53,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894099316] [2021-07-13 20:05:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-07-13 20:05:53,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918 [2021-07-13 20:05:53,436 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:05:53,437 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (3/3) [2021-07-13 20:05:53,437 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:05:53,438 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:05:53,439 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:05:53 BasicIcfg [2021-07-13 20:05:53,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:05:53,439 INFO L168 Benchmark]: Toolchain (without parser) took 815053.76 ms. Allocated memory was 196.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 175.6 MB in the beginning and 473.0 MB in the end (delta: -297.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-13 20:05:53,439 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 196.1 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:05:53,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.54 ms. Allocated memory is still 196.1 MB. Free memory was 175.6 MB in the beginning and 174.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:05:53,439 INFO L168 Benchmark]: Boogie Preprocessor took 19.01 ms. Allocated memory is still 196.1 MB. Free memory was 174.2 MB in the beginning and 173.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:05:53,439 INFO L168 Benchmark]: RCFGBuilder took 268.48 ms. Allocated memory is still 196.1 MB. Free memory was 173.0 MB in the beginning and 154.5 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:05:53,439 INFO L168 Benchmark]: TraceAbstraction took 814742.96 ms. Allocated memory was 196.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 154.1 MB in the beginning and 473.0 MB in the end (delta: -319.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-13 20:05:53,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 196.1 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.54 ms. Allocated memory is still 196.1 MB. Free memory was 175.6 MB in the beginning and 174.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.01 ms. Allocated memory is still 196.1 MB. Free memory was 174.2 MB in the beginning and 173.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 268.48 ms. Allocated memory is still 196.1 MB. Free memory was 173.0 MB in the beginning and 154.5 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 814742.96 ms. Allocated memory was 196.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 154.1 MB in the beginning and 473.0 MB in the end (delta: -319.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 4 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 6.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork0 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 814572.9ms, OverallIterations: 399, TraceHistogramMax: 2, EmptinessCheckTime: 4547.3ms, AutomataDifference: 537637.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43616 SDtfs, 114969 SDslu, 399094 SDs, 0 SdLazy, 459780 SolverSat, 46795 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 186924.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24127 GetRequests, 8205 SyntacticMatches, 588 SemanticMatches, 15334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205913 ImplicationChecksByTransitivity, 371421.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10118occurred in iteration=396, InterpolantAutomatonStates: 13767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47692.1ms AutomataMinimizationTime, 398 MinimizatonAttempts, 496795 StatesRemovedByMinimization, 395 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2221.5ms SsaConstructionTime, 4994.9ms SatisfiabilityAnalysisTime, 130615.7ms InterpolantComputationTime, 22608 NumberOfCodeBlocks, 22608 NumberOfCodeBlocksAsserted, 1205 NumberOfCheckSat, 21825 ConstructedInterpolants, 776 QuantifiedInterpolants, 284227 SizeOfPredicates, 3014 NumberOfNonLiveVariables, 48650 ConjunctsInSsa, 10812 ConjunctsInUnsatCore, 783 InterpolantComputations, 13 PerfectInterpolantSequences, 193/3571 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown