/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-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:51:43,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:51:43,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:51:43,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 17:51:43,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 17:51:43,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 17:51:43,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 17:51:43,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 17:51:43,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 17:51:43,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 17:51:43,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 17:51:43,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 17:51:43,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 17:51:43,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 17:51:43,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 17:51:43,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 17:51:43,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 17:51:43,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 17:51:43,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 17:51:43,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 17:51:43,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 17:51:43,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 17:51:43,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 17:51:43,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 17:51:43,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 17:51:43,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 17:51:43,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 17:51:43,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 17:51:43,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 17:51:43,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 17:51:43,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 17:51:43,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 17:51:43,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 17:51:43,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 17:51:43,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 17:51:43,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 17:51:43,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 17:51:43,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 17:51:43,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 17:51:43,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 17:51:43,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 17:51:43,489 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 [2021-07-09 17:51:43,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:51:43,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:51:43,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:51:43,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:51:43,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:51:43,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:51:43,511 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:51:43,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:51:43,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:51:43,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:51:43,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:51:43,512 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:51:43,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:51:43,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:51:43,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:51:43,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:51:43,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:51:43,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:51:43,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:51:43,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:51:43,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:51:43,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:51:43,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:51:43,529 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:51:43,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:51:43,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:51:43,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:51:43,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:51:43,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:51:43,782 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:51:43,782 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:51:43,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-07-09 17:51:43,783 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-07-09 17:51:44,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:51:44,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:51:44,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:51:44,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:51:44,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:51:44,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:51:44,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:51:44,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:51:44,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:51:44,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/1) ... [2021-07-09 17:51:44,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:51:44,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:51:44,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:51:44,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:51:44,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (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 [2021-07-09 17:51:44,155 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:51:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:51:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:51:44,156 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:51:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:51:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:51:44,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:51:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:51:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:51:44,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:51:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:51:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:51:44,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:51:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:51:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:51:44,159 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-09 17:51:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-09 17:51:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-09 17:51:44,159 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-07-09 17:51:44,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-07-09 17:51:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-07-09 17:51:44,160 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:51:44,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:51:44,348 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-09 17:51:44,349 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 17:51:44,349 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-09 17:51:44,349 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-07-09 17:51:44,349 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-07-09 17:51:44,350 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:51:44 BoogieIcfgContainer [2021-07-09 17:51:44,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:51:44,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:51:44,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:51:44,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:51:44,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:51:44" (1/2) ... [2021-07-09 17:51:44,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c92e5b and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:51:44, skipping insertion in model container [2021-07-09 17:51:44,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:51:44" (2/2) ... [2021-07-09 17:51:44,356 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-07-09 17:51:44,359 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:51:44,360 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:51:44,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:51:44,360 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:51:44,468 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-07-09 17:51:44,500 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 17:51:44,526 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:51:44,526 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:51:44,526 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:51:44,527 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:51:44,527 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:51:44,527 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:51:44,527 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:51:44,527 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork4======== [2021-07-09 17:51:44,541 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-07-09 17:51:44,569 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:51:44,580 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork4 was SAFE (1/3) [2021-07-09 17:51:44,582 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-09 17:51:44,598 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:51:44,598 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:51:44,598 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:51:44,598 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:51:44,598 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:51:44,598 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:51:44,599 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:51:44,599 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork1======== [2021-07-09 17:51:44,604 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-07-09 17:51:44,611 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 85 states have (on average 2.8941176470588235) internal successors, (246), 85 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 85 states have (on average 2.8941176470588235) internal successors, (246), 85 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,613 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:51:44,613 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork1 was SAFE (2/3) [2021-07-09 17:51:44,614 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:51:44,620 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:51:44,620 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:51:44,620 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:51:44,620 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:51:44,620 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:51:44,620 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:51:44,620 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:51:44,620 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:51:44,621 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-07-09 17:51:44,642 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:44,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:44,653 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] [2021-07-09 17:51:44,654 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:44,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-07-09 17:51:44,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:44,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098200978] [2021-07-09 17:51:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:44,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098200978] [2021-07-09 17:51:44,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098200978] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:51:44,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:51:44,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:51:44,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534436093] [2021-07-09 17:51:44,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:51:44,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:51:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:51:44,883 INFO L87 Difference]: Start difference. First operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:45,011 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-07-09 17:51:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:51:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:45,040 INFO L225 Difference]: With dead ends: 893 [2021-07-09 17:51:45,040 INFO L226 Difference]: Without dead ends: 874 [2021-07-09 17:51:45,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:51:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-07-09 17:51:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-07-09 17:51:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-07-09 17:51:45,126 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-07-09 17:51:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:45,127 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-07-09 17:51:45,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-07-09 17:51:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:45,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:45,130 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] [2021-07-09 17:51:45,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:51:45,130 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-07-09 17:51:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:45,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138584086] [2021-07-09 17:51:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138584086] [2021-07-09 17:51:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138584086] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:51:45,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:51:45,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:51:45,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817403175] [2021-07-09 17:51:45,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:51:45,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:45,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:51:45,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:51:45,209 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:45,277 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-07-09 17:51:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:51:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:45,284 INFO L225 Difference]: With dead ends: 872 [2021-07-09 17:51:45,285 INFO L226 Difference]: Without dead ends: 841 [2021-07-09 17:51:45,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:51:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-09 17:51:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-07-09 17:51:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-07-09 17:51:45,310 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-07-09 17:51:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:45,310 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-07-09 17:51:45,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-07-09 17:51:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:51:45,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:45,312 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] [2021-07-09 17:51:45,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:51:45,312 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-07-09 17:51:45,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:45,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089073898] [2021-07-09 17:51:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:45,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:45,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089073898] [2021-07-09 17:51:45,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089073898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621901916] [2021-07-09 17:51:45,373 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 [2021-07-09 17:51:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:51:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:45,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621901916] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:51:45,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:51:45,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-07-09 17:51:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407137848] [2021-07-09 17:51:45,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:51:45,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:51:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:51:45,629 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:45,674 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-07-09 17:51:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:51:45,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:51:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:45,679 INFO L225 Difference]: With dead ends: 867 [2021-07-09 17:51:45,679 INFO L226 Difference]: Without dead ends: 836 [2021-07-09 17:51:45,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:51:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-07-09 17:51:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-07-09 17:51:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-07-09 17:51:45,704 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-07-09 17:51:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:45,705 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-07-09 17:51:45,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-07-09 17:51:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:51:45,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:45,707 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] [2021-07-09 17:51:45,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 17:51:45,927 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-07-09 17:51:45,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:45,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468075765] [2021-07-09 17:51:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:45,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:45,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468075765] [2021-07-09 17:51:45,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468075765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:45,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500195234] [2021-07-09 17:51:45,987 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 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 [2021-07-09 17:51:46,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:46,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:51:46,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:46,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500195234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:46,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:46,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-07-09 17:51:46,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976829249] [2021-07-09 17:51:46,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:51:46,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:46,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:51:46,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:51:46,140 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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) [2021-07-09 17:51:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:46,253 INFO L93 Difference]: Finished difference Result 1660 states and 6252 transitions. [2021-07-09 17:51:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:51:46,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 27 [2021-07-09 17:51:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:46,261 INFO L225 Difference]: With dead ends: 1660 [2021-07-09 17:51:46,261 INFO L226 Difference]: Without dead ends: 1532 [2021-07-09 17:51:46,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:51:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-07-09 17:51:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-07-09 17:51:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.135214007782102) internal successors, (4251), 1028 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-07-09 17:51:46,320 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-07-09 17:51:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:46,321 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-07-09 17:51:46,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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) [2021-07-09 17:51:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-07-09 17:51:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:51:46,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:46,323 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] [2021-07-09 17:51:46,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:46,539 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-07-09 17:51:46,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:46,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526070969] [2021-07-09 17:51:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:46,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526070969] [2021-07-09 17:51:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526070969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:46,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596554479] [2021-07-09 17:51:46,582 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 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 [2021-07-09 17:51:46,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:51:46,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:51:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596554479] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:51:46,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:51:46,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-07-09 17:51:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999459318] [2021-07-09 17:51:46,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:51:46,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:51:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:51:46,693 INFO L87 Difference]: Start difference. First operand 1029 states and 4251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:46,729 INFO L93 Difference]: Finished difference Result 1331 states and 5140 transitions. [2021-07-09 17:51:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:51:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:51:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:46,736 INFO L225 Difference]: With dead ends: 1331 [2021-07-09 17:51:46,736 INFO L226 Difference]: Without dead ends: 1250 [2021-07-09 17:51:46,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:51:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-07-09 17:51:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-07-09 17:51:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.074501573976915) internal successors, (3883), 953 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-07-09 17:51:46,761 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-07-09 17:51:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:46,761 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-07-09 17:51:46,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-07-09 17:51:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:51:46,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:46,763 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] [2021-07-09 17:51:46,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:46,981 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash 96535007, now seen corresponding path program 1 times [2021-07-09 17:51:46,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:46,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628528244] [2021-07-09 17:51:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628528244] [2021-07-09 17:51:47,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628528244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679065801] [2021-07-09 17:51:47,009 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 [2021-07-09 17:51:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:51:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679065801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:47,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-07-09 17:51:47,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111266902] [2021-07-09 17:51:47,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:51:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:51:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:51:47,120 INFO L87 Difference]: Start difference. First operand 954 states and 3883 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2021-07-09 17:51:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:47,174 INFO L93 Difference]: Finished difference Result 1888 states and 7508 transitions. [2021-07-09 17:51:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:51:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 27 [2021-07-09 17:51:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:47,185 INFO L225 Difference]: With dead ends: 1888 [2021-07-09 17:51:47,186 INFO L226 Difference]: Without dead ends: 1828 [2021-07-09 17:51:47,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:51:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-09 17:51:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-07-09 17:51:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 4.125520110957004) internal successors, (5949), 1442 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-07-09 17:51:47,235 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-07-09 17:51:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:47,235 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-07-09 17:51:47,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2021-07-09 17:51:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-07-09 17:51:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:51:47,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:47,239 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] [2021-07-09 17:51:47,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:47,461 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-07-09 17:51:47,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:47,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542564762] [2021-07-09 17:51:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:47,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542564762] [2021-07-09 17:51:47,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542564762] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:51:47,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:51:47,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:51:47,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163958234] [2021-07-09 17:51:47,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:51:47,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:47,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:51:47,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:51:47,477 INFO L87 Difference]: Start difference. First operand 1443 states and 5949 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:47,503 INFO L93 Difference]: Finished difference Result 1479 states and 6007 transitions. [2021-07-09 17:51:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:51:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:51:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:47,510 INFO L225 Difference]: With dead ends: 1479 [2021-07-09 17:51:47,511 INFO L226 Difference]: Without dead ends: 1437 [2021-07-09 17:51:47,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:51:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-07-09 17:51:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-07-09 17:51:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 4.130190007037298) internal successors, (5869), 1421 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-07-09 17:51:47,546 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-07-09 17:51:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:47,546 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-07-09 17:51:47,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-07-09 17:51:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:47,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:47,550 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, 1, 1, 1] [2021-07-09 17:51:47,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:51:47,551 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1221830146, now seen corresponding path program 1 times [2021-07-09 17:51:47,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:47,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275426453] [2021-07-09 17:51:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275426453] [2021-07-09 17:51:47,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275426453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310206916] [2021-07-09 17:51:47,665 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 [2021-07-09 17:51:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:47,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 17:51:47,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:47,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-07-09 17:51:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310206916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:47,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:51:47,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083251377] [2021-07-09 17:51:47,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:47,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:47,941 INFO L87 Difference]: Start difference. First operand 1422 states and 5869 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:48,625 INFO L93 Difference]: Finished difference Result 1985 states and 8093 transitions. [2021-07-09 17:51:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:48,636 INFO L225 Difference]: With dead ends: 1985 [2021-07-09 17:51:48,636 INFO L226 Difference]: Without dead ends: 1966 [2021-07-09 17:51:48,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:51:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-07-09 17:51:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-07-09 17:51:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.118577075098814) internal successors, (6252), 1518 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-07-09 17:51:48,682 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-07-09 17:51:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:48,682 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-07-09 17:51:48,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-07-09 17:51:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:48,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:48,686 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] [2021-07-09 17:51:48,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:48,903 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1456540984, now seen corresponding path program 2 times [2021-07-09 17:51:48,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:48,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229647742] [2021-07-09 17:51:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:49,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:49,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229647742] [2021-07-09 17:51:49,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229647742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:49,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150013626] [2021-07-09 17:51:49,029 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 [2021-07-09 17:51:49,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:49,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:49,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:49,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:49,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:49,182 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 13 treesize of output 17 [2021-07-09 17:51:49,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:49,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:49,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:51:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:49,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150013626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:49,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:49,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:51:49,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247768912] [2021-07-09 17:51:49,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:49,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:49,326 INFO L87 Difference]: Start difference. First operand 1519 states and 6252 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:49,625 INFO L93 Difference]: Finished difference Result 1822 states and 7414 transitions. [2021-07-09 17:51:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:51:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:49,634 INFO L225 Difference]: With dead ends: 1822 [2021-07-09 17:51:49,635 INFO L226 Difference]: Without dead ends: 1803 [2021-07-09 17:51:49,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-07-09 17:51:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-07-09 17:51:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.117028270874425) internal successors, (6262), 1521 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-07-09 17:51:49,673 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-07-09 17:51:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:49,673 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-07-09 17:51:49,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-07-09 17:51:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:49,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:49,677 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] [2021-07-09 17:51:49,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:49,898 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2020138408, now seen corresponding path program 3 times [2021-07-09 17:51:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:49,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887745076] [2021-07-09 17:51:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:49,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:49,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887745076] [2021-07-09 17:51:49,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887745076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:49,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798530413] [2021-07-09 17:51:49,993 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 [2021-07-09 17:51:50,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:51:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:50,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:50,170 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 13 treesize of output 17 [2021-07-09 17:51:50,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:50,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:50,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:50,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:51:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:50,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798530413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:50,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:50,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:51:50,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653730570] [2021-07-09 17:51:50,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:50,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:50,293 INFO L87 Difference]: Start difference. First operand 1522 states and 6262 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:50,674 INFO L93 Difference]: Finished difference Result 1919 states and 7749 transitions. [2021-07-09 17:51:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:50,684 INFO L225 Difference]: With dead ends: 1919 [2021-07-09 17:51:50,684 INFO L226 Difference]: Without dead ends: 1900 [2021-07-09 17:51:50,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-07-09 17:51:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-07-09 17:51:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 4.111910994764398) internal successors, (6283), 1528 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-07-09 17:51:50,721 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-07-09 17:51:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:50,722 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-07-09 17:51:50,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-07-09 17:51:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:50,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:50,725 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] [2021-07-09 17:51:50,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:51:50,943 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1903603882, now seen corresponding path program 4 times [2021-07-09 17:51:50,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:50,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389542220] [2021-07-09 17:51:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:51,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:51,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389542220] [2021-07-09 17:51:51,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389542220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:51,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127315237] [2021-07-09 17:51:51,044 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 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 [2021-07-09 17:51:51,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:51,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:51,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-07-09 17:51:51,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:51,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:51,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:51,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-07-09 17:51:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127315237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:51,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:51,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:51:51,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554447834] [2021-07-09 17:51:51,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:51,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:51,252 INFO L87 Difference]: Start difference. First operand 1529 states and 6283 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:51,991 INFO L93 Difference]: Finished difference Result 2650 states and 10619 transitions. [2021-07-09 17:51:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:51:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:52,001 INFO L225 Difference]: With dead ends: 2650 [2021-07-09 17:51:52,002 INFO L226 Difference]: Without dead ends: 2626 [2021-07-09 17:51:52,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:51:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-07-09 17:51:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-07-09 17:51:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.138872043662826) internal successors, (6825), 1649 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-07-09 17:51:52,052 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-07-09 17:51:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:52,052 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-07-09 17:51:52,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-07-09 17:51:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:52,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:52,057 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] [2021-07-09 17:51:52,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:51:52,275 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:52,275 INFO L82 PathProgramCache]: Analyzing trace with hash 235210440, now seen corresponding path program 5 times [2021-07-09 17:51:52,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:52,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89004326] [2021-07-09 17:51:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:52,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:52,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89004326] [2021-07-09 17:51:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89004326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:52,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617371362] [2021-07-09 17:51:52,375 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 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 [2021-07-09 17:51:52,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:52,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:52,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-07-09 17:51:52,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:52,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:52,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:52,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-07-09 17:51:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:52,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617371362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:52,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:52,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:51:52,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170279894] [2021-07-09 17:51:52,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:52,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:52,616 INFO L87 Difference]: Start difference. First operand 1650 states and 6825 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:53,230 INFO L93 Difference]: Finished difference Result 2697 states and 10750 transitions. [2021-07-09 17:51:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:51:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:53,238 INFO L225 Difference]: With dead ends: 2697 [2021-07-09 17:51:53,238 INFO L226 Difference]: Without dead ends: 2648 [2021-07-09 17:51:53,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:51:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-07-09 17:51:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-07-09 17:51:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 4.145071295722257) internal successors, (6686), 1613 states have internal predecessors, (6686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-07-09 17:51:53,280 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-07-09 17:51:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:53,280 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-07-09 17:51:53,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-07-09 17:51:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:53,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:53,284 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] [2021-07-09 17:51:53,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:53,505 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash -986184770, now seen corresponding path program 6 times [2021-07-09 17:51:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:53,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403070823] [2021-07-09 17:51:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:53,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:53,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403070823] [2021-07-09 17:51:53,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403070823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137559784] [2021-07-09 17:51:53,604 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 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 [2021-07-09 17:51:53,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:51:53,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:51:53,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:53,731 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 15 treesize of output 9 [2021-07-09 17:51:53,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:53,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-07-09 17:51:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:53,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137559784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:53,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:51:53,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8667659] [2021-07-09 17:51:53,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:51:53,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:51:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:51:53,857 INFO L87 Difference]: Start difference. First operand 1614 states and 6686 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:54,592 INFO L93 Difference]: Finished difference Result 2293 states and 9357 transitions. [2021-07-09 17:51:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:51:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:54,599 INFO L225 Difference]: With dead ends: 2293 [2021-07-09 17:51:54,599 INFO L226 Difference]: Without dead ends: 2274 [2021-07-09 17:51:54,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:51:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-07-09 17:51:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-07-09 17:51:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 4.147407870081199) internal successors, (6640), 1601 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-07-09 17:51:54,643 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-07-09 17:51:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:54,643 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-07-09 17:51:54,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-07-09 17:51:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:54,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:54,647 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] [2021-07-09 17:51:54,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:54,864 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -68027252, now seen corresponding path program 7 times [2021-07-09 17:51:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449232556] [2021-07-09 17:51:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:54,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449232556] [2021-07-09 17:51:54,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449232556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:54,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872578637] [2021-07-09 17:51:54,998 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 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 [2021-07-09 17:51:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:55,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:55,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:51:55,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:55,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:55,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:55,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:51:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:55,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872578637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:55,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:55,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:51:55,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792005287] [2021-07-09 17:51:55,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:55,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:55,205 INFO L87 Difference]: Start difference. First operand 1602 states and 6640 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:55,975 INFO L93 Difference]: Finished difference Result 2621 states and 10631 transitions. [2021-07-09 17:51:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:51:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:55,982 INFO L225 Difference]: With dead ends: 2621 [2021-07-09 17:51:55,983 INFO L226 Difference]: Without dead ends: 2583 [2021-07-09 17:51:55,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 621.8ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:51:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-07-09 17:51:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1794. [2021-07-09 17:51:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.1751254880089235) internal successors, (7486), 1793 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7486 transitions. [2021-07-09 17:51:56,024 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7486 transitions. Word has length 29 [2021-07-09 17:51:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:56,025 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7486 transitions. [2021-07-09 17:51:56,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7486 transitions. [2021-07-09 17:51:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:56,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:56,029 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] [2021-07-09 17:51:56,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:51:56,246 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:56,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1235245354, now seen corresponding path program 8 times [2021-07-09 17:51:56,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:56,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628315816] [2021-07-09 17:51:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:56,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:56,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628315816] [2021-07-09 17:51:56,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628315816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:56,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859844446] [2021-07-09 17:51:56,332 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 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 [2021-07-09 17:51:56,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:56,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:56,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:56,429 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 [2021-07-09 17:51:56,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:56,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:56,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:56,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:51:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859844446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:56,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:56,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:51:56,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687943285] [2021-07-09 17:51:56,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:56,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:56,583 INFO L87 Difference]: Start difference. First operand 1794 states and 7486 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:56,952 INFO L93 Difference]: Finished difference Result 2154 states and 8857 transitions. [2021-07-09 17:51:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:56,958 INFO L225 Difference]: With dead ends: 2154 [2021-07-09 17:51:56,958 INFO L226 Difference]: Without dead ends: 2141 [2021-07-09 17:51:56,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:51:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-07-09 17:51:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1787. [2021-07-09 17:51:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 4.1780515117581185) internal successors, (7462), 1786 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 7462 transitions. [2021-07-09 17:51:56,995 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 7462 transitions. Word has length 29 [2021-07-09 17:51:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:56,996 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 7462 transitions. [2021-07-09 17:51:56,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 7462 transitions. [2021-07-09 17:51:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:57,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:57,000 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] [2021-07-09 17:51:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:51:57,213 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 335883282, now seen corresponding path program 9 times [2021-07-09 17:51:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139544578] [2021-07-09 17:51:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:57,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139544578] [2021-07-09 17:51:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139544578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578308108] [2021-07-09 17:51:57,310 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 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 [2021-07-09 17:51:57,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:51:57,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:51:57,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:57,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:57,410 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 [2021-07-09 17:51:57,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:51:57,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:57,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:51:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:57,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578308108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:57,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:57,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:51:57,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428662246] [2021-07-09 17:51:57,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:57,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:57,540 INFO L87 Difference]: Start difference. First operand 1787 states and 7462 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:57,884 INFO L93 Difference]: Finished difference Result 2189 states and 8940 transitions. [2021-07-09 17:51:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:51:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:57,889 INFO L225 Difference]: With dead ends: 2189 [2021-07-09 17:51:57,889 INFO L226 Difference]: Without dead ends: 2174 [2021-07-09 17:51:57,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-07-09 17:51:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1794. [2021-07-09 17:51:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.173452314556609) internal successors, (7483), 1793 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) [2021-07-09 17:51:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7483 transitions. [2021-07-09 17:51:57,926 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7483 transitions. Word has length 29 [2021-07-09 17:51:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:57,927 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7483 transitions. [2021-07-09 17:51:57,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7483 transitions. [2021-07-09 17:51:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:57,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:57,931 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] [2021-07-09 17:51:58,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:51:58,145 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1444715020, now seen corresponding path program 10 times [2021-07-09 17:51:58,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:58,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908283851] [2021-07-09 17:51:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:58,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908283851] [2021-07-09 17:51:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908283851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187424026] [2021-07-09 17:51:58,247 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 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 [2021-07-09 17:51:58,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:58,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:58,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:58,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:51:58,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:58,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:58,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:58,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:51:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:58,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187424026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:58,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:58,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:51:58,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653007592] [2021-07-09 17:51:58,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:58,435 INFO L87 Difference]: Start difference. First operand 1794 states and 7483 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:59,022 INFO L93 Difference]: Finished difference Result 2601 states and 10341 transitions. [2021-07-09 17:51:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:51:59,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:51:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:59,028 INFO L225 Difference]: With dead ends: 2601 [2021-07-09 17:51:59,028 INFO L226 Difference]: Without dead ends: 2561 [2021-07-09 17:51:59,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:51:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-07-09 17:51:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1747. [2021-07-09 17:51:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 4.18213058419244) internal successors, (7302), 1746 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-07-09 17:51:59,064 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-07-09 17:51:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:59,065 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-07-09 17:51:59,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-07-09 17:51:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:51:59,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:59,070 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] [2021-07-09 17:51:59,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:59,285 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1050279366, now seen corresponding path program 11 times [2021-07-09 17:51:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:59,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997080721] [2021-07-09 17:51:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:59,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997080721] [2021-07-09 17:51:59,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997080721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005964709] [2021-07-09 17:51:59,395 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 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 [2021-07-09 17:51:59,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:51:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:51:59,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:59,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:59,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:51:59,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:51:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005964709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:59,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:59,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:51:59,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956578885] [2021-07-09 17:51:59,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:59,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:59,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:59,588 INFO L87 Difference]: Start difference. First operand 1747 states and 7302 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:00,145 INFO L93 Difference]: Finished difference Result 2160 states and 8941 transitions. [2021-07-09 17:52:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:00,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:00,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:00,150 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 17:52:00,151 INFO L226 Difference]: Without dead ends: 2145 [2021-07-09 17:52:00,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:52:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-09 17:52:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1744. [2021-07-09 17:52:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 4.183591508892714) internal successors, (7292), 1743 states have internal predecessors, (7292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 7292 transitions. [2021-07-09 17:52:00,182 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 7292 transitions. Word has length 29 [2021-07-09 17:52:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:00,182 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 7292 transitions. [2021-07-09 17:52:00,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 7292 transitions. [2021-07-09 17:52:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:00,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:00,186 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] [2021-07-09 17:52:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:52:00,393 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2099051768, now seen corresponding path program 12 times [2021-07-09 17:52:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:00,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519145819] [2021-07-09 17:52:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:00,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519145819] [2021-07-09 17:52:00,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519145819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801922200] [2021-07-09 17:52:00,489 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 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 [2021-07-09 17:52:00,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:52:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:52:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:00,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:00,594 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 [2021-07-09 17:52:00,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:00,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:00,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:00,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-09 17:52:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:00,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801922200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:00,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:00,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:52:00,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879363958] [2021-07-09 17:52:00,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:00,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:00,702 INFO L87 Difference]: Start difference. First operand 1744 states and 7292 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-09 17:52:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:00,990 INFO L93 Difference]: Finished difference Result 2257 states and 9217 transitions. [2021-07-09 17:52:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:52:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 29 [2021-07-09 17:52:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:00,996 INFO L225 Difference]: With dead ends: 2257 [2021-07-09 17:52:00,996 INFO L226 Difference]: Without dead ends: 2238 [2021-07-09 17:52:00,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:52:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-07-09 17:52:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1814. [2021-07-09 17:52:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 4.200220628792057) internal successors, (7615), 1813 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 7615 transitions. [2021-07-09 17:52:01,027 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 7615 transitions. Word has length 29 [2021-07-09 17:52:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:01,027 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 7615 transitions. [2021-07-09 17:52:01,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-07-09 17:52:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 7615 transitions. [2021-07-09 17:52:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:01,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:01,031 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] [2021-07-09 17:52:01,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:01,241 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash -795779162, now seen corresponding path program 13 times [2021-07-09 17:52:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:01,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778873207] [2021-07-09 17:52:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:01,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:01,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778873207] [2021-07-09 17:52:01,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778873207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:01,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715416244] [2021-07-09 17:52:01,332 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 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 [2021-07-09 17:52:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:52:01,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:01,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:52:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:01,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715416244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:01,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:01,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:52:01,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110121631] [2021-07-09 17:52:01,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:01,518 INFO L87 Difference]: Start difference. First operand 1814 states and 7615 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:02,063 INFO L93 Difference]: Finished difference Result 2776 states and 11185 transitions. [2021-07-09 17:52:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:52:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:02,070 INFO L225 Difference]: With dead ends: 2776 [2021-07-09 17:52:02,071 INFO L226 Difference]: Without dead ends: 2752 [2021-07-09 17:52:02,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:52:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-07-09 17:52:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1926. [2021-07-09 17:52:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.208311688311689) internal successors, (8101), 1925 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 8101 transitions. [2021-07-09 17:52:02,105 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 8101 transitions. Word has length 29 [2021-07-09 17:52:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:02,105 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 8101 transitions. [2021-07-09 17:52:02,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 8101 transitions. [2021-07-09 17:52:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:02,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:02,109 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] [2021-07-09 17:52:02,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:02,325 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1830794692, now seen corresponding path program 14 times [2021-07-09 17:52:02,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:02,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994985936] [2021-07-09 17:52:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:02,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:02,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994985936] [2021-07-09 17:52:02,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994985936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744054554] [2021-07-09 17:52:02,417 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 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 [2021-07-09 17:52:02,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:02,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:02,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 17:52:02,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:02,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:02,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:02,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744054554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:02,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:02,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:02,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394838324] [2021-07-09 17:52:02,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:02,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:02,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:02,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:02,638 INFO L87 Difference]: Start difference. First operand 1926 states and 8101 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:02,977 INFO L93 Difference]: Finished difference Result 2334 states and 9589 transitions. [2021-07-09 17:52:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:52:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:02,983 INFO L225 Difference]: With dead ends: 2334 [2021-07-09 17:52:02,983 INFO L226 Difference]: Without dead ends: 2320 [2021-07-09 17:52:02,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:52:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-09 17:52:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-07-09 17:52:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.211157455683003) internal successors, (8077), 1918 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8077 transitions. [2021-07-09 17:52:03,035 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8077 transitions. Word has length 29 [2021-07-09 17:52:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:03,035 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8077 transitions. [2021-07-09 17:52:03,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8077 transitions. [2021-07-09 17:52:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:03,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:03,040 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] [2021-07-09 17:52:03,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:52:03,249 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash -849165682, now seen corresponding path program 15 times [2021-07-09 17:52:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:03,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661629259] [2021-07-09 17:52:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:03,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661629259] [2021-07-09 17:52:03,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661629259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338257218] [2021-07-09 17:52:03,341 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 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 [2021-07-09 17:52:03,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:52:03,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:52:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:03,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:03,424 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 [2021-07-09 17:52:03,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:03,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:03,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:03,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:52:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338257218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:03,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744224436] [2021-07-09 17:52:03,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:03,548 INFO L87 Difference]: Start difference. First operand 1919 states and 8077 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:03,840 INFO L93 Difference]: Finished difference Result 2310 states and 9540 transitions. [2021-07-09 17:52:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:52:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:03,846 INFO L225 Difference]: With dead ends: 2310 [2021-07-09 17:52:03,846 INFO L226 Difference]: Without dead ends: 2287 [2021-07-09 17:52:03,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:52:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-07-09 17:52:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1872. [2021-07-09 17:52:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-07-09 17:52:03,879 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-07-09 17:52:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:03,879 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-07-09 17:52:03,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-07-09 17:52:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:03,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:03,883 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, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:04,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:04,087 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1579819448, now seen corresponding path program 16 times [2021-07-09 17:52:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:04,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789353847] [2021-07-09 17:52:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:04,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789353847] [2021-07-09 17:52:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789353847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550727819] [2021-07-09 17:52:04,207 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 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 [2021-07-09 17:52:04,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:04,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:04,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:52:04,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:04,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:52:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550727819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:04,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:04,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:52:04,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046402844] [2021-07-09 17:52:04,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:04,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:04,418 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:05,052 INFO L93 Difference]: Finished difference Result 2324 states and 9664 transitions. [2021-07-09 17:52:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:05,058 INFO L225 Difference]: With dead ends: 2324 [2021-07-09 17:52:05,058 INFO L226 Difference]: Without dead ends: 2305 [2021-07-09 17:52:05,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:52:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-09 17:52:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1872. [2021-07-09 17:52:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-07-09 17:52:05,090 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-07-09 17:52:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:05,090 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-07-09 17:52:05,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-07-09 17:52:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:05,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:05,094 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] [2021-07-09 17:52:05,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:52:05,294 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2143416872, now seen corresponding path program 17 times [2021-07-09 17:52:05,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:05,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323256671] [2021-07-09 17:52:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:05,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:05,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323256671] [2021-07-09 17:52:05,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323256671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756348307] [2021-07-09 17:52:05,405 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 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 [2021-07-09 17:52:05,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:05,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:52:05,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:05,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:52:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:05,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756348307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:05,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:52:05,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192860628] [2021-07-09 17:52:05,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:05,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:05,589 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:06,312 INFO L93 Difference]: Finished difference Result 2792 states and 11337 transitions. [2021-07-09 17:52:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:52:06,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:06,320 INFO L225 Difference]: With dead ends: 2792 [2021-07-09 17:52:06,320 INFO L226 Difference]: Without dead ends: 2750 [2021-07-09 17:52:06,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:52:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-07-09 17:52:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1860. [2021-07-09 17:52:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 4.2210866057019905) internal successors, (7847), 1859 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-07-09 17:52:06,358 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-07-09 17:52:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:06,359 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-07-09 17:52:06,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-07-09 17:52:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:06,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:06,363 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] [2021-07-09 17:52:06,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:52:06,579 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 312359488, now seen corresponding path program 1 times [2021-07-09 17:52:06,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:06,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790497686] [2021-07-09 17:52:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:06,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:06,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790497686] [2021-07-09 17:52:06,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790497686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:06,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687983815] [2021-07-09 17:52:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:52:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:06,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:06,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:06,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:06,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:06,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:52:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:06,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687983815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:06,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:06,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 17:52:06,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520355207] [2021-07-09 17:52:06,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:52:06,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:52:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:52:06,830 INFO L87 Difference]: Start difference. First operand 1860 states and 7847 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:52:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:06,974 INFO L93 Difference]: Finished difference Result 2474 states and 10275 transitions. [2021-07-09 17:52:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 29 [2021-07-09 17:52:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:06,980 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 17:52:06,980 INFO L226 Difference]: Without dead ends: 2455 [2021-07-09 17:52:06,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:52:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-07-09 17:52:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1982. [2021-07-09 17:52:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 4.223119636547199) internal successors, (8366), 1981 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 8366 transitions. [2021-07-09 17:52:07,016 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 8366 transitions. Word has length 29 [2021-07-09 17:52:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:07,017 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 8366 transitions. [2021-07-09 17:52:07,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:52:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 8366 transitions. [2021-07-09 17:52:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:07,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:07,020 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] [2021-07-09 17:52:07,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:07,221 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1734714314, now seen corresponding path program 2 times [2021-07-09 17:52:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:07,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987093218] [2021-07-09 17:52:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:07,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:07,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987093218] [2021-07-09 17:52:07,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987093218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:07,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137169653] [2021-07-09 17:52:07,296 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 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 [2021-07-09 17:52:07,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:07,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:07,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:07,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:07,401 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 [2021-07-09 17:52:07,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:07,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:07,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:07,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137169653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:07,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:07,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:52:07,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687516707] [2021-07-09 17:52:07,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:07,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:07,529 INFO L87 Difference]: Start difference. First operand 1982 states and 8366 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:08,063 INFO L93 Difference]: Finished difference Result 2637 states and 10901 transitions. [2021-07-09 17:52:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:08,069 INFO L225 Difference]: With dead ends: 2637 [2021-07-09 17:52:08,069 INFO L226 Difference]: Without dead ends: 2606 [2021-07-09 17:52:08,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:52:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-07-09 17:52:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1919. [2021-07-09 17:52:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.238269030239834) internal successors, (8129), 1918 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8129 transitions. [2021-07-09 17:52:08,104 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8129 transitions. Word has length 29 [2021-07-09 17:52:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:08,104 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8129 transitions. [2021-07-09 17:52:08,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8129 transitions. [2021-07-09 17:52:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:08,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:08,108 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] [2021-07-09 17:52:08,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:52:08,325 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1773592538, now seen corresponding path program 3 times [2021-07-09 17:52:08,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:08,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80456781] [2021-07-09 17:52:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:08,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80456781] [2021-07-09 17:52:08,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80456781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342563545] [2021-07-09 17:52:08,398 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 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 [2021-07-09 17:52:08,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:52:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:52:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:08,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:08,483 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 [2021-07-09 17:52:08,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:08,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:08,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:08,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-09 17:52:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:08,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342563545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:08,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:52:08,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309451771] [2021-07-09 17:52:08,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:08,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:08,602 INFO L87 Difference]: Start difference. First operand 1919 states and 8129 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:09,163 INFO L93 Difference]: Finished difference Result 2442 states and 10230 transitions. [2021-07-09 17:52:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:52:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:09,170 INFO L225 Difference]: With dead ends: 2442 [2021-07-09 17:52:09,170 INFO L226 Difference]: Without dead ends: 2427 [2021-07-09 17:52:09,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:52:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-07-09 17:52:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1904. [2021-07-09 17:52:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 4.242249080399369) internal successors, (8073), 1903 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 8073 transitions. [2021-07-09 17:52:09,207 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 8073 transitions. Word has length 29 [2021-07-09 17:52:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:09,207 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 8073 transitions. [2021-07-09 17:52:09,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 8073 transitions. [2021-07-09 17:52:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:09,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:09,211 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] [2021-07-09 17:52:09,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:09,412 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash 409541884, now seen corresponding path program 4 times [2021-07-09 17:52:09,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:09,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663902254] [2021-07-09 17:52:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:09,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:09,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663902254] [2021-07-09 17:52:09,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663902254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:09,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265001473] [2021-07-09 17:52:09,495 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 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 [2021-07-09 17:52:09,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:09,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:09,580 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 13 treesize of output 7 [2021-07-09 17:52:09,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:09,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-09 17:52:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:09,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265001473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:09,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:09,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 17:52:09,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68887319] [2021-07-09 17:52:09,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:52:09,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:09,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:52:09,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:52:09,648 INFO L87 Difference]: Start difference. First operand 1904 states and 8073 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:52:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:09,789 INFO L93 Difference]: Finished difference Result 2559 states and 10558 transitions. [2021-07-09 17:52:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 29 [2021-07-09 17:52:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:09,795 INFO L225 Difference]: With dead ends: 2559 [2021-07-09 17:52:09,795 INFO L226 Difference]: Without dead ends: 2540 [2021-07-09 17:52:09,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:52:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-07-09 17:52:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2008. [2021-07-09 17:52:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 4.241155954160439) internal successors, (8512), 2007 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 8512 transitions. [2021-07-09 17:52:09,834 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 8512 transitions. Word has length 29 [2021-07-09 17:52:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:09,834 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 8512 transitions. [2021-07-09 17:52:09,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:52:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 8512 transitions. [2021-07-09 17:52:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:09,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:09,838 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] [2021-07-09 17:52:10,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:52:10,054 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1831896710, now seen corresponding path program 5 times [2021-07-09 17:52:10,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:10,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980945839] [2021-07-09 17:52:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:10,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980945839] [2021-07-09 17:52:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980945839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686777904] [2021-07-09 17:52:10,140 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 [2021-07-09 17:52:10,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:52:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:10,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:10,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:10,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:52:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:10,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686777904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:10,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:10,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:52:10,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174400191] [2021-07-09 17:52:10,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:52:10,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:52:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:52:10,305 INFO L87 Difference]: Start difference. First operand 2008 states and 8512 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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) [2021-07-09 17:52:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:10,432 INFO L93 Difference]: Finished difference Result 2517 states and 10450 transitions. [2021-07-09 17:52:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:10,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 29 [2021-07-09 17:52:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:10,438 INFO L225 Difference]: With dead ends: 2517 [2021-07-09 17:52:10,438 INFO L226 Difference]: Without dead ends: 2486 [2021-07-09 17:52:10,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-07-09 17:52:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1928. [2021-07-09 17:52:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 4.242345614945511) internal successors, (8175), 1927 states have internal predecessors, (8175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 8175 transitions. [2021-07-09 17:52:10,475 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 8175 transitions. Word has length 29 [2021-07-09 17:52:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:10,475 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 8175 transitions. [2021-07-09 17:52:10,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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) [2021-07-09 17:52:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 8175 transitions. [2021-07-09 17:52:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:10,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:10,479 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] [2021-07-09 17:52:10,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:52:10,681 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -768158788, now seen corresponding path program 6 times [2021-07-09 17:52:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:10,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058526324] [2021-07-09 17:52:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058526324] [2021-07-09 17:52:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058526324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058135422] [2021-07-09 17:52:10,772 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 [2021-07-09 17:52:10,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:10,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:10,884 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 [2021-07-09 17:52:10,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:10,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:10,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:11,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058135422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:11,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:11,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:52:11,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117952409] [2021-07-09 17:52:11,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:11,025 INFO L87 Difference]: Start difference. First operand 1928 states and 8175 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:11,582 INFO L93 Difference]: Finished difference Result 2183 states and 9102 transitions. [2021-07-09 17:52:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:11,588 INFO L225 Difference]: With dead ends: 2183 [2021-07-09 17:52:11,588 INFO L226 Difference]: Without dead ends: 2164 [2021-07-09 17:52:11,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:52:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-07-09 17:52:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1916. [2021-07-09 17:52:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 4.246997389033942) internal successors, (8133), 1915 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 8133 transitions. [2021-07-09 17:52:11,617 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 8133 transitions. Word has length 29 [2021-07-09 17:52:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:11,618 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 8133 transitions. [2021-07-09 17:52:11,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 8133 transitions. [2021-07-09 17:52:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:11,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:11,621 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] [2021-07-09 17:52:11,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:11,822 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash 783680366, now seen corresponding path program 7 times [2021-07-09 17:52:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:11,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386688261] [2021-07-09 17:52:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:11,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:11,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386688261] [2021-07-09 17:52:11,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386688261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:11,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177602477] [2021-07-09 17:52:11,904 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 [2021-07-09 17:52:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:11,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:11,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:11,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 17:52:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:12,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177602477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:12,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:52:12,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314131401] [2021-07-09 17:52:12,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:52:12,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:52:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:52:12,060 INFO L87 Difference]: Start difference. First operand 1916 states and 8133 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-07-09 17:52:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:12,267 INFO L93 Difference]: Finished difference Result 2667 states and 11011 transitions. [2021-07-09 17:52:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:52:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 29 [2021-07-09 17:52:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:12,274 INFO L225 Difference]: With dead ends: 2667 [2021-07-09 17:52:12,274 INFO L226 Difference]: Without dead ends: 2648 [2021-07-09 17:52:12,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-07-09 17:52:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2028. [2021-07-09 17:52:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 4.24173655648742) internal successors, (8598), 2027 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 8598 transitions. [2021-07-09 17:52:12,307 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 8598 transitions. Word has length 29 [2021-07-09 17:52:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 8598 transitions. [2021-07-09 17:52:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-07-09 17:52:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 8598 transitions. [2021-07-09 17:52:12,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:12,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:12,311 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] [2021-07-09 17:52:12,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:12,516 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2088932104, now seen corresponding path program 8 times [2021-07-09 17:52:12,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:12,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55453642] [2021-07-09 17:52:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:12,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:12,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55453642] [2021-07-09 17:52:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55453642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181321687] [2021-07-09 17:52:12,600 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 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 [2021-07-09 17:52:12,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:12,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:12,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:12,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-09 17:52:12,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:12,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:12,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:12,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181321687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:12,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:52:12,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278700325] [2021-07-09 17:52:12,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:12,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:12,808 INFO L87 Difference]: Start difference. First operand 2028 states and 8598 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:13,391 INFO L93 Difference]: Finished difference Result 2896 states and 11879 transitions. [2021-07-09 17:52:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:13,399 INFO L225 Difference]: With dead ends: 2896 [2021-07-09 17:52:13,399 INFO L226 Difference]: Without dead ends: 2852 [2021-07-09 17:52:13,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:52:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-07-09 17:52:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1948. [2021-07-09 17:52:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 4.242937853107344) internal successors, (8261), 1947 states have internal predecessors, (8261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 8261 transitions. [2021-07-09 17:52:13,433 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 8261 transitions. Word has length 29 [2021-07-09 17:52:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:13,434 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 8261 transitions. [2021-07-09 17:52:13,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 8261 transitions. [2021-07-09 17:52:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:13,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:13,438 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] [2021-07-09 17:52:13,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 17:52:13,638 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:13,639 INFO L82 PathProgramCache]: Analyzing trace with hash -394020306, now seen corresponding path program 9 times [2021-07-09 17:52:13,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:13,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36016714] [2021-07-09 17:52:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:13,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:13,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36016714] [2021-07-09 17:52:13,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36016714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:13,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560977702] [2021-07-09 17:52:13,735 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 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 [2021-07-09 17:52:13,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:13,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:13,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:13,836 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 13 treesize of output 17 [2021-07-09 17:52:13,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:13,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:13,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:13,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560977702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:13,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:13,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:52:13,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511885511] [2021-07-09 17:52:13,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:13,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:13,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:13,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:13,950 INFO L87 Difference]: Start difference. First operand 1948 states and 8261 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:14,531 INFO L93 Difference]: Finished difference Result 2330 states and 9645 transitions. [2021-07-09 17:52:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:14,537 INFO L225 Difference]: With dead ends: 2330 [2021-07-09 17:52:14,537 INFO L226 Difference]: Without dead ends: 2311 [2021-07-09 17:52:14,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:52:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-07-09 17:52:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1924. [2021-07-09 17:52:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 4.2428497139885595) internal successors, (8159), 1923 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 8159 transitions. [2021-07-09 17:52:14,569 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 8159 transitions. Word has length 29 [2021-07-09 17:52:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:14,569 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 8159 transitions. [2021-07-09 17:52:14,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 8159 transitions. [2021-07-09 17:52:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:14,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:14,573 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] [2021-07-09 17:52:14,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:14,774 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1761581676, now seen corresponding path program 10 times [2021-07-09 17:52:14,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:14,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773141436] [2021-07-09 17:52:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:14,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773141436] [2021-07-09 17:52:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773141436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456016024] [2021-07-09 17:52:14,868 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 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 [2021-07-09 17:52:14,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:14,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 17:52:14,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:14,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:14,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:14,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-09 17:52:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:14,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456016024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:14,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:14,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 17:52:14,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77431522] [2021-07-09 17:52:14,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:52:14,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:14,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:52:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:52:14,997 INFO L87 Difference]: Start difference. First operand 1924 states and 8159 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-07-09 17:52:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:15,196 INFO L93 Difference]: Finished difference Result 2053 states and 8574 transitions. [2021-07-09 17:52:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:52:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 29 [2021-07-09 17:52:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:15,201 INFO L225 Difference]: With dead ends: 2053 [2021-07-09 17:52:15,201 INFO L226 Difference]: Without dead ends: 2034 [2021-07-09 17:52:15,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-09 17:52:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1927. [2021-07-09 17:52:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 4.238836967808931) internal successors, (8164), 1926 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 8164 transitions. [2021-07-09 17:52:15,230 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 8164 transitions. Word has length 29 [2021-07-09 17:52:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:15,230 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 8164 transitions. [2021-07-09 17:52:15,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-07-09 17:52:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 8164 transitions. [2021-07-09 17:52:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:15,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:15,234 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] [2021-07-09 17:52:15,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:52:15,434 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash -81335312, now seen corresponding path program 18 times [2021-07-09 17:52:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:15,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608286184] [2021-07-09 17:52:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:15,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608286184] [2021-07-09 17:52:15,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608286184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025590636] [2021-07-09 17:52:15,532 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 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 [2021-07-09 17:52:15,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:15,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:15,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-09 17:52:15,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:15,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:15,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:15,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025590636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:15,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:15,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:15,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232307108] [2021-07-09 17:52:15,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:15,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:15,756 INFO L87 Difference]: Start difference. First operand 1927 states and 8164 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:16,400 INFO L93 Difference]: Finished difference Result 2627 states and 10950 transitions. [2021-07-09 17:52:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:16,406 INFO L225 Difference]: With dead ends: 2627 [2021-07-09 17:52:16,407 INFO L226 Difference]: Without dead ends: 2608 [2021-07-09 17:52:16,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:52:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-09 17:52:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2057. [2021-07-09 17:52:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 4.261186770428016) internal successors, (8761), 2056 states have internal predecessors, (8761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 8761 transitions. [2021-07-09 17:52:16,457 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 8761 transitions. Word has length 29 [2021-07-09 17:52:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:16,457 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 8761 transitions. [2021-07-09 17:52:16,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 8761 transitions. [2021-07-09 17:52:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:16,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:16,462 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] [2021-07-09 17:52:16,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:52:16,662 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:16,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:16,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1221937294, now seen corresponding path program 19 times [2021-07-09 17:52:16,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:16,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915087778] [2021-07-09 17:52:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:16,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:16,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915087778] [2021-07-09 17:52:16,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915087778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:16,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822627817] [2021-07-09 17:52:16,761 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 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 [2021-07-09 17:52:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:16,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:16,871 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 17:52:16,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:16,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:16,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:16,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-07-09 17:52:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:16,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822627817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:16,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:16,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853573634] [2021-07-09 17:52:16,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:16,976 INFO L87 Difference]: Start difference. First operand 2057 states and 8761 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:17,480 INFO L93 Difference]: Finished difference Result 2726 states and 11138 transitions. [2021-07-09 17:52:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:17,487 INFO L225 Difference]: With dead ends: 2726 [2021-07-09 17:52:17,487 INFO L226 Difference]: Without dead ends: 2676 [2021-07-09 17:52:17,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:52:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-07-09 17:52:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2133. [2021-07-09 17:52:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.25984990619137) internal successors, (9082), 2132 states have internal predecessors, (9082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9082 transitions. [2021-07-09 17:52:17,524 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9082 transitions. Word has length 29 [2021-07-09 17:52:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:17,524 INFO L482 AbstractCegarLoop]: Abstraction has 2133 states and 9082 transitions. [2021-07-09 17:52:17,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9082 transitions. [2021-07-09 17:52:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:17,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:17,528 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] [2021-07-09 17:52:17,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:52:17,729 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash -446456148, now seen corresponding path program 20 times [2021-07-09 17:52:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:17,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669555278] [2021-07-09 17:52:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:17,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669555278] [2021-07-09 17:52:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669555278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144460346] [2021-07-09 17:52:17,818 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 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 [2021-07-09 17:52:17,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:17,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:17,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:17,922 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 13 treesize of output 17 [2021-07-09 17:52:17,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:17,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:17,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:17,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:18,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144460346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:18,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:18,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340630792] [2021-07-09 17:52:18,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:18,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:18,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:18,060 INFO L87 Difference]: Start difference. First operand 2133 states and 9082 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:18,564 INFO L93 Difference]: Finished difference Result 2572 states and 10732 transitions. [2021-07-09 17:52:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:18,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:18,571 INFO L225 Difference]: With dead ends: 2572 [2021-07-09 17:52:18,571 INFO L226 Difference]: Without dead ends: 2554 [2021-07-09 17:52:18,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:52:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-07-09 17:52:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2126. [2021-07-09 17:52:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 4.264941176470588) internal successors, (9063), 2125 states have internal predecessors, (9063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 9063 transitions. [2021-07-09 17:52:18,608 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 9063 transitions. Word has length 29 [2021-07-09 17:52:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:18,608 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 9063 transitions. [2021-07-09 17:52:18,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 9063 transitions. [2021-07-09 17:52:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:18,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:18,612 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] [2021-07-09 17:52:18,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:52:18,812 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1168550774, now seen corresponding path program 21 times [2021-07-09 17:52:18,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:18,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010063150] [2021-07-09 17:52:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:18,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:18,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010063150] [2021-07-09 17:52:18,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010063150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719261151] [2021-07-09 17:52:18,899 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 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 [2021-07-09 17:52:18,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:19,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:19,000 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 13 treesize of output 17 [2021-07-09 17:52:19,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:19,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:19,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:19,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719261151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:19,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:19,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:19,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307783801] [2021-07-09 17:52:19,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:19,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:19,111 INFO L87 Difference]: Start difference. First operand 2126 states and 9063 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:19,717 INFO L93 Difference]: Finished difference Result 2581 states and 10762 transitions. [2021-07-09 17:52:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:52:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:19,723 INFO L225 Difference]: With dead ends: 2581 [2021-07-09 17:52:19,723 INFO L226 Difference]: Without dead ends: 2542 [2021-07-09 17:52:19,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:52:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-09 17:52:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2101. [2021-07-09 17:52:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 4.27) internal successors, (8967), 2100 states have internal predecessors, (8967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 8967 transitions. [2021-07-09 17:52:19,755 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 8967 transitions. Word has length 29 [2021-07-09 17:52:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:19,755 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 8967 transitions. [2021-07-09 17:52:19,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 8967 transitions. [2021-07-09 17:52:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:19,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:19,759 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] [2021-07-09 17:52:19,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:52:19,960 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 22 times [2021-07-09 17:52:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:19,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606448092] [2021-07-09 17:52:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:20,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:20,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606448092] [2021-07-09 17:52:20,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606448092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386560910] [2021-07-09 17:52:20,054 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 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 [2021-07-09 17:52:20,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:20,161 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 13 treesize of output 9 [2021-07-09 17:52:20,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:20,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-07-09 17:52:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:20,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386560910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:20,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:20,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939377607] [2021-07-09 17:52:20,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:20,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:20,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:20,284 INFO L87 Difference]: Start difference. First operand 2101 states and 8967 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:20,804 INFO L93 Difference]: Finished difference Result 2477 states and 10397 transitions. [2021-07-09 17:52:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:20,811 INFO L225 Difference]: With dead ends: 2477 [2021-07-09 17:52:20,811 INFO L226 Difference]: Without dead ends: 2433 [2021-07-09 17:52:20,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:52:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-09 17:52:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2104. [2021-07-09 17:52:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 4.266761768901569) internal successors, (8973), 2103 states have internal predecessors, (8973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 8973 transitions. [2021-07-09 17:52:20,845 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 8973 transitions. Word has length 29 [2021-07-09 17:52:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:20,845 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 8973 transitions. [2021-07-09 17:52:20,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 8973 transitions. [2021-07-09 17:52:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:20,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:20,848 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] [2021-07-09 17:52:21,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:52:21,050 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 23 times [2021-07-09 17:52:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:21,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427699575] [2021-07-09 17:52:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:21,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:21,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427699575] [2021-07-09 17:52:21,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427699575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:21,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511917961] [2021-07-09 17:52:21,138 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 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 [2021-07-09 17:52:21,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:52:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:21,241 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 15 treesize of output 9 [2021-07-09 17:52:21,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:21,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:21,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:21,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-07-09 17:52:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:21,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511917961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:21,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:21,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:52:21,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348379149] [2021-07-09 17:52:21,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:21,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:21,326 INFO L87 Difference]: Start difference. First operand 2104 states and 8973 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:21,715 INFO L93 Difference]: Finished difference Result 2516 states and 10534 transitions. [2021-07-09 17:52:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:52:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:21,721 INFO L225 Difference]: With dead ends: 2516 [2021-07-09 17:52:21,722 INFO L226 Difference]: Without dead ends: 2502 [2021-07-09 17:52:21,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:52:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-07-09 17:52:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2094. [2021-07-09 17:52:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 4.272336359292881) internal successors, (8942), 2093 states have internal predecessors, (8942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 8942 transitions. [2021-07-09 17:52:21,754 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 8942 transitions. Word has length 29 [2021-07-09 17:52:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:21,754 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 8942 transitions. [2021-07-09 17:52:21,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 8942 transitions. [2021-07-09 17:52:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:21,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:21,758 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] [2021-07-09 17:52:21,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:52:21,958 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 24 times [2021-07-09 17:52:21,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:21,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486198715] [2021-07-09 17:52:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:22,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:22,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486198715] [2021-07-09 17:52:22,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486198715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:22,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858341074] [2021-07-09 17:52:22,065 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 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 [2021-07-09 17:52:22,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:22,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:22,218 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 15 treesize of output 19 [2021-07-09 17:52:22,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:22,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:22,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:22,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-09 17:52:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:22,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858341074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:22,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:22,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718339039] [2021-07-09 17:52:22,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:22,330 INFO L87 Difference]: Start difference. First operand 2094 states and 8942 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:22,766 INFO L93 Difference]: Finished difference Result 2299 states and 9721 transitions. [2021-07-09 17:52:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:52:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:22,772 INFO L225 Difference]: With dead ends: 2299 [2021-07-09 17:52:22,772 INFO L226 Difference]: Without dead ends: 2284 [2021-07-09 17:52:22,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:52:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-07-09 17:52:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2106. [2021-07-09 17:52:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 4.263182897862233) internal successors, (8974), 2105 states have internal predecessors, (8974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 8974 transitions. [2021-07-09 17:52:22,805 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 8974 transitions. Word has length 29 [2021-07-09 17:52:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:22,805 INFO L482 AbstractCegarLoop]: Abstraction has 2106 states and 8974 transitions. [2021-07-09 17:52:22,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 8974 transitions. [2021-07-09 17:52:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:22,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:22,808 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] [2021-07-09 17:52:23,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:23,017 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1867952308, now seen corresponding path program 25 times [2021-07-09 17:52:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:23,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465440435] [2021-07-09 17:52:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:23,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:23,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465440435] [2021-07-09 17:52:23,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465440435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:23,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598431955] [2021-07-09 17:52:23,101 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 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 [2021-07-09 17:52:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:23,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:23,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:23,187 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 [2021-07-09 17:52:23,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:23,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-09 17:52:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:23,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598431955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:23,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:23,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211405344] [2021-07-09 17:52:23,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:23,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:23,320 INFO L87 Difference]: Start difference. First operand 2106 states and 8974 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:24,210 INFO L93 Difference]: Finished difference Result 3202 states and 13180 transitions. [2021-07-09 17:52:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:52:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:24,218 INFO L225 Difference]: With dead ends: 3202 [2021-07-09 17:52:24,218 INFO L226 Difference]: Without dead ends: 3152 [2021-07-09 17:52:24,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 696.9ms TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:52:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-07-09 17:52:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2285. [2021-07-09 17:52:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 4.270140105078809) internal successors, (9753), 2284 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 9753 transitions. [2021-07-09 17:52:24,264 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 9753 transitions. Word has length 29 [2021-07-09 17:52:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:24,264 INFO L482 AbstractCegarLoop]: Abstraction has 2285 states and 9753 transitions. [2021-07-09 17:52:24,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 9753 transitions. [2021-07-09 17:52:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:24,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:24,268 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, 1, 1, 1] [2021-07-09 17:52:24,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:24,469 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1123742382, now seen corresponding path program 26 times [2021-07-09 17:52:24,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:24,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815112755] [2021-07-09 17:52:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:24,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:24,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815112755] [2021-07-09 17:52:24,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815112755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:24,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977998248] [2021-07-09 17:52:24,549 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 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 [2021-07-09 17:52:24,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:24,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:24,643 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 [2021-07-09 17:52:24,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:24,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:24,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:24,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:24,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977998248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:24,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:24,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022810552] [2021-07-09 17:52:24,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:24,771 INFO L87 Difference]: Start difference. First operand 2285 states and 9753 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:25,388 INFO L93 Difference]: Finished difference Result 2667 states and 11189 transitions. [2021-07-09 17:52:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:52:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:25,395 INFO L225 Difference]: With dead ends: 2667 [2021-07-09 17:52:25,395 INFO L226 Difference]: Without dead ends: 2650 [2021-07-09 17:52:25,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:52:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-07-09 17:52:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2278. [2021-07-09 17:52:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 4.274923144488362) internal successors, (9734), 2277 states have internal predecessors, (9734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 9734 transitions. [2021-07-09 17:52:25,431 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 9734 transitions. Word has length 29 [2021-07-09 17:52:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:25,431 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 9734 transitions. [2021-07-09 17:52:25,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 9734 transitions. [2021-07-09 17:52:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:25,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:25,435 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] [2021-07-09 17:52:25,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:25,635 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2023104454, now seen corresponding path program 27 times [2021-07-09 17:52:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:25,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840015632] [2021-07-09 17:52:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:25,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:25,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840015632] [2021-07-09 17:52:25,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840015632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:25,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565296850] [2021-07-09 17:52:25,716 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 [2021-07-09 17:52:25,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:25,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:25,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:25,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:25,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:25,808 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 [2021-07-09 17:52:25,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:25,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:25,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:25,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565296850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:25,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:25,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491563693] [2021-07-09 17:52:25,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:25,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:25,958 INFO L87 Difference]: Start difference. First operand 2278 states and 9734 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:26,782 INFO L93 Difference]: Finished difference Result 2794 states and 11689 transitions. [2021-07-09 17:52:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:52:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:26,789 INFO L225 Difference]: With dead ends: 2794 [2021-07-09 17:52:26,789 INFO L226 Difference]: Without dead ends: 2771 [2021-07-09 17:52:26,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:52:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-07-09 17:52:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2273. [2021-07-09 17:52:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 2272 states have (on average 4.276848591549296) internal successors, (9717), 2272 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 9717 transitions. [2021-07-09 17:52:26,827 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 9717 transitions. Word has length 29 [2021-07-09 17:52:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:26,828 INFO L482 AbstractCegarLoop]: Abstraction has 2273 states and 9717 transitions. [2021-07-09 17:52:26,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 9717 transitions. [2021-07-09 17:52:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:26,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:26,831 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] [2021-07-09 17:52:27,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 17:52:27,032 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash 491264540, now seen corresponding path program 28 times [2021-07-09 17:52:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:27,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49669007] [2021-07-09 17:52:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:27,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49669007] [2021-07-09 17:52:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49669007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864473295] [2021-07-09 17:52:27,117 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 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 [2021-07-09 17:52:27,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:27,206 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 [2021-07-09 17:52:27,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:27,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:27,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:27,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-09 17:52:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864473295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:27,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896489453] [2021-07-09 17:52:27,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:27,331 INFO L87 Difference]: Start difference. First operand 2273 states and 9717 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:27,952 INFO L93 Difference]: Finished difference Result 2905 states and 11942 transitions. [2021-07-09 17:52:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:52:27,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:27,959 INFO L225 Difference]: With dead ends: 2905 [2021-07-09 17:52:27,959 INFO L226 Difference]: Without dead ends: 2849 [2021-07-09 17:52:27,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:52:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-07-09 17:52:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2209. [2021-07-09 17:52:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 4.294384057971015) internal successors, (9482), 2208 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9482 transitions. [2021-07-09 17:52:28,011 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9482 transitions. Word has length 29 [2021-07-09 17:52:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:28,011 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 9482 transitions. [2021-07-09 17:52:28,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9482 transitions. [2021-07-09 17:52:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:28,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:28,015 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] [2021-07-09 17:52:28,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:28,224 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 29 times [2021-07-09 17:52:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:28,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052974138] [2021-07-09 17:52:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:28,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052974138] [2021-07-09 17:52:28,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052974138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723246292] [2021-07-09 17:52:28,322 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 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 [2021-07-09 17:52:28,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:28,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:52:28,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:28,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:52:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723246292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:28,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:52:28,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9928547] [2021-07-09 17:52:28,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:28,498 INFO L87 Difference]: Start difference. First operand 2209 states and 9482 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:29,087 INFO L93 Difference]: Finished difference Result 2491 states and 10584 transitions. [2021-07-09 17:52:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:29,093 INFO L225 Difference]: With dead ends: 2491 [2021-07-09 17:52:29,093 INFO L226 Difference]: Without dead ends: 2476 [2021-07-09 17:52:29,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:52:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-07-09 17:52:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2206. [2021-07-09 17:52:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.295691609977324) internal successors, (9472), 2205 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9472 transitions. [2021-07-09 17:52:29,131 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9472 transitions. Word has length 29 [2021-07-09 17:52:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:29,132 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9472 transitions. [2021-07-09 17:52:29,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9472 transitions. [2021-07-09 17:52:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:29,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:29,135 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] [2021-07-09 17:52:29,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:29,336 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash -163072208, now seen corresponding path program 30 times [2021-07-09 17:52:29,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:29,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351699160] [2021-07-09 17:52:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:29,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:29,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351699160] [2021-07-09 17:52:29,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351699160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:29,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130996705] [2021-07-09 17:52:29,419 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 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 [2021-07-09 17:52:29,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:29,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:29,515 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 [2021-07-09 17:52:29,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:29,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:29,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:29,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:29,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130996705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:29,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:29,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707245309] [2021-07-09 17:52:29,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:29,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:29,690 INFO L87 Difference]: Start difference. First operand 2206 states and 9472 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:30,437 INFO L93 Difference]: Finished difference Result 2860 states and 11959 transitions. [2021-07-09 17:52:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:52:30,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:30,444 INFO L225 Difference]: With dead ends: 2860 [2021-07-09 17:52:30,444 INFO L226 Difference]: Without dead ends: 2841 [2021-07-09 17:52:30,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 688.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:52:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-07-09 17:52:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2276. [2021-07-09 17:52:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 4.304175824175824) internal successors, (9792), 2275 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 9792 transitions. [2021-07-09 17:52:30,483 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 9792 transitions. Word has length 29 [2021-07-09 17:52:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:30,483 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 9792 transitions. [2021-07-09 17:52:30,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 9792 transitions. [2021-07-09 17:52:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:30,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:30,487 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] [2021-07-09 17:52:30,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:52:30,687 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1140200398, now seen corresponding path program 31 times [2021-07-09 17:52:30,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:30,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930468141] [2021-07-09 17:52:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:30,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:30,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930468141] [2021-07-09 17:52:30,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930468141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:30,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771460662] [2021-07-09 17:52:30,769 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 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 [2021-07-09 17:52:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:30,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:30,862 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 [2021-07-09 17:52:30,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:30,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:30,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:30,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-09 17:52:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:31,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771460662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:31,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:31,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217869453] [2021-07-09 17:52:31,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:31,024 INFO L87 Difference]: Start difference. First operand 2276 states and 9792 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:31,580 INFO L93 Difference]: Finished difference Result 3077 states and 12673 transitions. [2021-07-09 17:52:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:52:31,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:31,588 INFO L225 Difference]: With dead ends: 3077 [2021-07-09 17:52:31,589 INFO L226 Difference]: Without dead ends: 3033 [2021-07-09 17:52:31,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:52:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2021-07-09 17:52:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2293. [2021-07-09 17:52:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 4.287085514834206) internal successors, (9826), 2292 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 9826 transitions. [2021-07-09 17:52:31,629 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 9826 transitions. Word has length 29 [2021-07-09 17:52:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:31,629 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 9826 transitions. [2021-07-09 17:52:31,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 9826 transitions. [2021-07-09 17:52:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:31,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:31,633 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] [2021-07-09 17:52:31,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:52:31,834 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash -528193044, now seen corresponding path program 32 times [2021-07-09 17:52:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:31,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745637991] [2021-07-09 17:52:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:31,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745637991] [2021-07-09 17:52:31,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745637991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746399726] [2021-07-09 17:52:31,919 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 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 [2021-07-09 17:52:31,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:31,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:32,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:32,003 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 [2021-07-09 17:52:32,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:32,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:32,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746399726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:32,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308508705] [2021-07-09 17:52:32,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:32,138 INFO L87 Difference]: Start difference. First operand 2293 states and 9826 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:32,742 INFO L93 Difference]: Finished difference Result 2719 states and 11375 transitions. [2021-07-09 17:52:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:52:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:32,750 INFO L225 Difference]: With dead ends: 2719 [2021-07-09 17:52:32,750 INFO L226 Difference]: Without dead ends: 2701 [2021-07-09 17:52:32,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:52:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-07-09 17:52:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2286. [2021-07-09 17:52:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 4.291903719912472) internal successors, (9807), 2285 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 9807 transitions. [2021-07-09 17:52:32,789 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 9807 transitions. Word has length 29 [2021-07-09 17:52:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:32,789 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 9807 transitions. [2021-07-09 17:52:32,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 9807 transitions. [2021-07-09 17:52:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:32,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:32,793 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] [2021-07-09 17:52:32,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:52:32,994 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1086813878, now seen corresponding path program 33 times [2021-07-09 17:52:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:32,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139782036] [2021-07-09 17:52:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:33,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:33,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139782036] [2021-07-09 17:52:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139782036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:33,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228928898] [2021-07-09 17:52:33,070 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 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 [2021-07-09 17:52:33,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:33,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:33,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:33,157 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 [2021-07-09 17:52:33,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:33,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:33,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:33,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:33,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228928898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:33,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:33,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804444307] [2021-07-09 17:52:33,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:33,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:33,285 INFO L87 Difference]: Start difference. First operand 2286 states and 9807 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:33,938 INFO L93 Difference]: Finished difference Result 2691 states and 11318 transitions. [2021-07-09 17:52:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:52:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:33,946 INFO L225 Difference]: With dead ends: 2691 [2021-07-09 17:52:33,946 INFO L226 Difference]: Without dead ends: 2652 [2021-07-09 17:52:33,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:52:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-07-09 17:52:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2230. [2021-07-09 17:52:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.293405114401077) internal successors, (9570), 2229 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9570 transitions. [2021-07-09 17:52:33,981 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9570 transitions. Word has length 29 [2021-07-09 17:52:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:33,981 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 9570 transitions. [2021-07-09 17:52:33,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9570 transitions. [2021-07-09 17:52:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:33,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:33,985 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] [2021-07-09 17:52:34,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:34,185 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 356160112, now seen corresponding path program 34 times [2021-07-09 17:52:34,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:34,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498777628] [2021-07-09 17:52:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:34,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:34,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498777628] [2021-07-09 17:52:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498777628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:34,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478678579] [2021-07-09 17:52:34,275 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 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 [2021-07-09 17:52:34,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:34,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:52:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:34,366 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 11 treesize of output 7 [2021-07-09 17:52:34,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:34,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-07-09 17:52:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:34,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478678579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:34,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:34,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:34,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634806234] [2021-07-09 17:52:34,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:34,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:34,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:34,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:34,511 INFO L87 Difference]: Start difference. First operand 2230 states and 9570 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:35,324 INFO L93 Difference]: Finished difference Result 2788 states and 11797 transitions. [2021-07-09 17:52:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:52:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:35,331 INFO L225 Difference]: With dead ends: 2788 [2021-07-09 17:52:35,331 INFO L226 Difference]: Without dead ends: 2748 [2021-07-09 17:52:35,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:52:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-07-09 17:52:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2230. [2021-07-09 17:52:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.291610587707492) internal successors, (9566), 2229 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9566 transitions. [2021-07-09 17:52:35,368 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9566 transitions. Word has length 29 [2021-07-09 17:52:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:35,368 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 9566 transitions. [2021-07-09 17:52:35,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9566 transitions. [2021-07-09 17:52:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:35,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:35,372 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] [2021-07-09 17:52:35,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:35,573 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash -207437312, now seen corresponding path program 35 times [2021-07-09 17:52:35,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:35,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110744720] [2021-07-09 17:52:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:35,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:35,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110744720] [2021-07-09 17:52:35,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110744720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:35,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709123238] [2021-07-09 17:52:35,660 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 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 [2021-07-09 17:52:35,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:52:35,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:35,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:35,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:52:35,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:35,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:52:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709123238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:35,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:35,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:52:35,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384085495] [2021-07-09 17:52:35,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:35,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:35,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:35,839 INFO L87 Difference]: Start difference. First operand 2230 states and 9566 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:36,345 INFO L93 Difference]: Finished difference Result 2832 states and 11974 transitions. [2021-07-09 17:52:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:36,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:36,353 INFO L225 Difference]: With dead ends: 2832 [2021-07-09 17:52:36,353 INFO L226 Difference]: Without dead ends: 2809 [2021-07-09 17:52:36,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:52:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-07-09 17:52:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2230. [2021-07-09 17:52:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.291610587707492) internal successors, (9566), 2229 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9566 transitions. [2021-07-09 17:52:36,390 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9566 transitions. Word has length 29 [2021-07-09 17:52:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:36,390 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 9566 transitions. [2021-07-09 17:52:36,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9566 transitions. [2021-07-09 17:52:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:36,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:36,394 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] [2021-07-09 17:52:36,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:36,595 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 11 times [2021-07-09 17:52:36,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:36,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229943334] [2021-07-09 17:52:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:36,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229943334] [2021-07-09 17:52:36,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229943334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824932167] [2021-07-09 17:52:36,770 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 [2021-07-09 17:52:36,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:36,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:36,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:36,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 17:52:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824932167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:36,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:36,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:52:36,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746637313] [2021-07-09 17:52:36,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:52:36,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:52:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:36,925 INFO L87 Difference]: Start difference. First operand 2230 states and 9566 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-07-09 17:52:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:37,152 INFO L93 Difference]: Finished difference Result 2973 states and 12521 transitions. [2021-07-09 17:52:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:52:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-07-09 17:52:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:37,159 INFO L225 Difference]: With dead ends: 2973 [2021-07-09 17:52:37,159 INFO L226 Difference]: Without dead ends: 2954 [2021-07-09 17:52:37,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-07-09 17:52:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2418. [2021-07-09 17:52:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 4.291683905668184) internal successors, (10373), 2417 states have internal predecessors, (10373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 10373 transitions. [2021-07-09 17:52:37,197 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 10373 transitions. Word has length 29 [2021-07-09 17:52:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:37,198 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 10373 transitions. [2021-07-09 17:52:37,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-07-09 17:52:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 10373 transitions. [2021-07-09 17:52:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:37,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:37,201 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] [2021-07-09 17:52:37,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:37,402 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 12 times [2021-07-09 17:52:37,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:37,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140522631] [2021-07-09 17:52:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140522631] [2021-07-09 17:52:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140522631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140696042] [2021-07-09 17:52:37,553 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 [2021-07-09 17:52:37,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:37,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:37,652 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 13 treesize of output 17 [2021-07-09 17:52:37,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:37,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:37,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:37,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140696042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:37,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:37,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:37,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445857684] [2021-07-09 17:52:37,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:37,763 INFO L87 Difference]: Start difference. First operand 2418 states and 10373 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:38,204 INFO L93 Difference]: Finished difference Result 2831 states and 11904 transitions. [2021-07-09 17:52:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:38,211 INFO L225 Difference]: With dead ends: 2831 [2021-07-09 17:52:38,212 INFO L226 Difference]: Without dead ends: 2818 [2021-07-09 17:52:38,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:52:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-07-09 17:52:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2409. [2021-07-09 17:52:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 4.295265780730897) internal successors, (10343), 2408 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 10343 transitions. [2021-07-09 17:52:38,249 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 10343 transitions. Word has length 29 [2021-07-09 17:52:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:38,249 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 10343 transitions. [2021-07-09 17:52:38,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 10343 transitions. [2021-07-09 17:52:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:38,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:38,253 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, 1, 1, 1] [2021-07-09 17:52:38,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 17:52:38,454 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:38,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 13 times [2021-07-09 17:52:38,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:38,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361624413] [2021-07-09 17:52:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:38,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:38,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361624413] [2021-07-09 17:52:38,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361624413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:38,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523465518] [2021-07-09 17:52:38,605 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 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 [2021-07-09 17:52:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:38,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:38,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:38,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:38,727 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 13 treesize of output 7 [2021-07-09 17:52:38,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:38,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:38,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:38,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-09 17:52:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:38,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523465518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:38,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:38,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:52:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144669139] [2021-07-09 17:52:38,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:38,796 INFO L87 Difference]: Start difference. First operand 2409 states and 10343 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:39,008 INFO L93 Difference]: Finished difference Result 2986 states and 12547 transitions. [2021-07-09 17:52:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:52:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 29 [2021-07-09 17:52:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:39,016 INFO L225 Difference]: With dead ends: 2986 [2021-07-09 17:52:39,016 INFO L226 Difference]: Without dead ends: 2958 [2021-07-09 17:52:39,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-07-09 17:52:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2380. [2021-07-09 17:52:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 4.2984447246742326) internal successors, (10226), 2379 states have internal predecessors, (10226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 10226 transitions. [2021-07-09 17:52:39,056 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 10226 transitions. Word has length 29 [2021-07-09 17:52:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:39,056 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 10226 transitions. [2021-07-09 17:52:39,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 10226 transitions. [2021-07-09 17:52:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:39,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:39,061 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, 1, 1, 1] [2021-07-09 17:52:39,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:39,277 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 14 times [2021-07-09 17:52:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:39,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300830826] [2021-07-09 17:52:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:39,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300830826] [2021-07-09 17:52:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300830826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253445584] [2021-07-09 17:52:39,468 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 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 [2021-07-09 17:52:39,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:39,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:39,581 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 13 treesize of output 17 [2021-07-09 17:52:39,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:39,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:39,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:39,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-07-09 17:52:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:39,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253445584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:39,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:39,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818111237] [2021-07-09 17:52:39,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:39,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:39,701 INFO L87 Difference]: Start difference. First operand 2380 states and 10226 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:40,545 INFO L93 Difference]: Finished difference Result 3039 states and 12879 transitions. [2021-07-09 17:52:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:52:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:40,553 INFO L225 Difference]: With dead ends: 3039 [2021-07-09 17:52:40,553 INFO L226 Difference]: Without dead ends: 3024 [2021-07-09 17:52:40,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 773.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:52:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-07-09 17:52:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2368. [2021-07-09 17:52:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.300802703844529) internal successors, (10180), 2367 states have internal predecessors, (10180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10180 transitions. [2021-07-09 17:52:40,594 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10180 transitions. Word has length 29 [2021-07-09 17:52:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:40,595 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10180 transitions. [2021-07-09 17:52:40,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10180 transitions. [2021-07-09 17:52:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:40,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:40,599 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] [2021-07-09 17:52:40,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 17:52:40,799 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 15 times [2021-07-09 17:52:40,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:40,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897408830] [2021-07-09 17:52:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:40,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897408830] [2021-07-09 17:52:40,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897408830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409340181] [2021-07-09 17:52:40,965 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 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 [2021-07-09 17:52:41,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:41,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:41,110 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 15 treesize of output 19 [2021-07-09 17:52:41,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:41,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:41,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:41,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-09 17:52:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409340181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305758345] [2021-07-09 17:52:41,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:41,195 INFO L87 Difference]: Start difference. First operand 2368 states and 10180 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:41,619 INFO L93 Difference]: Finished difference Result 2462 states and 10482 transitions. [2021-07-09 17:52:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:52:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:41,625 INFO L225 Difference]: With dead ends: 2462 [2021-07-09 17:52:41,625 INFO L226 Difference]: Without dead ends: 2447 [2021-07-09 17:52:41,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:52:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-09 17:52:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2362. [2021-07-09 17:52:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 4.303684879288437) internal successors, (10161), 2361 states have internal predecessors, (10161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 10161 transitions. [2021-07-09 17:52:41,660 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 10161 transitions. Word has length 29 [2021-07-09 17:52:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:41,660 INFO L482 AbstractCegarLoop]: Abstraction has 2362 states and 10161 transitions. [2021-07-09 17:52:41,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 10161 transitions. [2021-07-09 17:52:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:41,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:41,664 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] [2021-07-09 17:52:41,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:52:41,865 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 16 times [2021-07-09 17:52:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125753514] [2021-07-09 17:52:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:42,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125753514] [2021-07-09 17:52:42,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125753514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:42,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139713977] [2021-07-09 17:52:42,025 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 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 [2021-07-09 17:52:42,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:42,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:42,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:42,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:52:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139713977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:42,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:42,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:52:42,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776341865] [2021-07-09 17:52:42,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:52:42,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:42,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:52:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:42,183 INFO L87 Difference]: Start difference. First operand 2362 states and 10161 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-07-09 17:52:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:42,385 INFO L93 Difference]: Finished difference Result 2934 states and 12421 transitions. [2021-07-09 17:52:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:42,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-07-09 17:52:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:42,392 INFO L225 Difference]: With dead ends: 2934 [2021-07-09 17:52:42,392 INFO L226 Difference]: Without dead ends: 2915 [2021-07-09 17:52:42,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-07-09 17:52:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2481. [2021-07-09 17:52:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2480 states have (on average 4.30241935483871) internal successors, (10670), 2480 states have internal predecessors, (10670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 10670 transitions. [2021-07-09 17:52:42,432 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 10670 transitions. Word has length 29 [2021-07-09 17:52:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:42,432 INFO L482 AbstractCegarLoop]: Abstraction has 2481 states and 10670 transitions. [2021-07-09 17:52:42,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-07-09 17:52:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 10670 transitions. [2021-07-09 17:52:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:42,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:42,436 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] [2021-07-09 17:52:42,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:42,645 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:42,645 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 17 times [2021-07-09 17:52:42,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:42,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730050049] [2021-07-09 17:52:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:42,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730050049] [2021-07-09 17:52:42,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730050049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:42,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3114334] [2021-07-09 17:52:42,763 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 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 [2021-07-09 17:52:42,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:42,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:42,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:42,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:52:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3114334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:42,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:42,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:52:42,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028645375] [2021-07-09 17:52:42,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:42,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:42,910 INFO L87 Difference]: Start difference. First operand 2481 states and 10670 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:43,055 INFO L93 Difference]: Finished difference Result 2950 states and 12458 transitions. [2021-07-09 17:52:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 29 [2021-07-09 17:52:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:43,063 INFO L225 Difference]: With dead ends: 2950 [2021-07-09 17:52:43,063 INFO L226 Difference]: Without dead ends: 2919 [2021-07-09 17:52:43,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-07-09 17:52:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2401. [2021-07-09 17:52:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2400 states have (on average 4.306666666666667) internal successors, (10336), 2400 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 10336 transitions. [2021-07-09 17:52:43,104 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 10336 transitions. Word has length 29 [2021-07-09 17:52:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:43,104 INFO L482 AbstractCegarLoop]: Abstraction has 2401 states and 10336 transitions. [2021-07-09 17:52:43,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 10336 transitions. [2021-07-09 17:52:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:43,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:43,108 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] [2021-07-09 17:52:43,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 17:52:43,309 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 18 times [2021-07-09 17:52:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:43,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852453733] [2021-07-09 17:52:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:43,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:43,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852453733] [2021-07-09 17:52:43,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852453733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:43,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081162468] [2021-07-09 17:52:43,431 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 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 [2021-07-09 17:52:43,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:43,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:43,532 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 [2021-07-09 17:52:43,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:43,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:43,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:43,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:43,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081162468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:43,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:43,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:43,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281116511] [2021-07-09 17:52:43,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:43,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:43,703 INFO L87 Difference]: Start difference. First operand 2401 states and 10336 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:44,342 INFO L93 Difference]: Finished difference Result 2617 states and 11117 transitions. [2021-07-09 17:52:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:44,349 INFO L225 Difference]: With dead ends: 2617 [2021-07-09 17:52:44,349 INFO L226 Difference]: Without dead ends: 2602 [2021-07-09 17:52:44,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:52:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-09 17:52:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2371. [2021-07-09 17:52:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2370 states have (on average 4.30379746835443) internal successors, (10200), 2370 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 10200 transitions. [2021-07-09 17:52:44,387 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 10200 transitions. Word has length 29 [2021-07-09 17:52:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:44,387 INFO L482 AbstractCegarLoop]: Abstraction has 2371 states and 10200 transitions. [2021-07-09 17:52:44,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 10200 transitions. [2021-07-09 17:52:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:44,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:44,391 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] [2021-07-09 17:52:44,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:44,592 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:44,592 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 19 times [2021-07-09 17:52:44,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:44,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494494210] [2021-07-09 17:52:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:44,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:44,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494494210] [2021-07-09 17:52:44,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494494210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:44,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177637327] [2021-07-09 17:52:44,717 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 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 [2021-07-09 17:52:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:44,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:44,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:44,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:44,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:44,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:52:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177637327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:44,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:44,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:52:44,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041364434] [2021-07-09 17:52:44,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:52:44,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:44,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:52:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:44,866 INFO L87 Difference]: Start difference. First operand 2371 states and 10200 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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) [2021-07-09 17:52:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:45,068 INFO L93 Difference]: Finished difference Result 2978 states and 12481 transitions. [2021-07-09 17:52:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-07-09 17:52:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:45,077 INFO L225 Difference]: With dead ends: 2978 [2021-07-09 17:52:45,077 INFO L226 Difference]: Without dead ends: 2959 [2021-07-09 17:52:45,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-07-09 17:52:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2475. [2021-07-09 17:52:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.297898140662894) internal successors, (10633), 2474 states have internal predecessors, (10633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10633 transitions. [2021-07-09 17:52:45,127 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10633 transitions. Word has length 29 [2021-07-09 17:52:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:45,127 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10633 transitions. [2021-07-09 17:52:45,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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) [2021-07-09 17:52:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10633 transitions. [2021-07-09 17:52:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:45,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:45,132 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] [2021-07-09 17:52:45,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 17:52:45,333 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 20 times [2021-07-09 17:52:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:45,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076500676] [2021-07-09 17:52:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:45,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076500676] [2021-07-09 17:52:45,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076500676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426559367] [2021-07-09 17:52:45,466 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 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 [2021-07-09 17:52:45,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:45,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:45,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:45,555 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 [2021-07-09 17:52:45,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:45,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:45,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:45,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:45,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426559367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:45,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:45,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:45,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51335598] [2021-07-09 17:52:45,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:45,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:45,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:45,682 INFO L87 Difference]: Start difference. First operand 2475 states and 10633 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:46,165 INFO L93 Difference]: Finished difference Result 2877 states and 12016 transitions. [2021-07-09 17:52:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:46,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:46,172 INFO L225 Difference]: With dead ends: 2877 [2021-07-09 17:52:46,172 INFO L226 Difference]: Without dead ends: 2864 [2021-07-09 17:52:46,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:52:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-07-09 17:52:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2475. [2021-07-09 17:52:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.296685529506871) internal successors, (10630), 2474 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10630 transitions. [2021-07-09 17:52:46,214 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10630 transitions. Word has length 29 [2021-07-09 17:52:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:46,215 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10630 transitions. [2021-07-09 17:52:46,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10630 transitions. [2021-07-09 17:52:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:46,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:46,219 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] [2021-07-09 17:52:46,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:46,433 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 32025046, now seen corresponding path program 21 times [2021-07-09 17:52:46,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:46,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619654991] [2021-07-09 17:52:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:46,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619654991] [2021-07-09 17:52:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619654991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437082157] [2021-07-09 17:52:46,565 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 [2021-07-09 17:52:46,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:46,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:46,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:46,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:46,656 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 [2021-07-09 17:52:46,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:46,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:46,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:46,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:46,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437082157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:46,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:46,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:52:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725501298] [2021-07-09 17:52:46,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:52:46,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:52:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:46,804 INFO L87 Difference]: Start difference. First operand 2475 states and 10630 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:47,482 INFO L93 Difference]: Finished difference Result 2830 states and 11884 transitions. [2021-07-09 17:52:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:52:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:47,489 INFO L225 Difference]: With dead ends: 2830 [2021-07-09 17:52:47,489 INFO L226 Difference]: Without dead ends: 2815 [2021-07-09 17:52:47,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:52:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-07-09 17:52:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2475. [2021-07-09 17:52:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 4.295472918350849) internal successors, (10627), 2474 states have internal predecessors, (10627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 10627 transitions. [2021-07-09 17:52:47,528 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 10627 transitions. Word has length 29 [2021-07-09 17:52:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:47,528 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 10627 transitions. [2021-07-09 17:52:47,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 10627 transitions. [2021-07-09 17:52:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:47,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:47,532 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] [2021-07-09 17:52:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 17:52:47,732 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1748573256, now seen corresponding path program 22 times [2021-07-09 17:52:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13763017] [2021-07-09 17:52:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:47,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:47,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13763017] [2021-07-09 17:52:47,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13763017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:47,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203940574] [2021-07-09 17:52:47,844 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 [2021-07-09 17:52:47,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:47,967 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 13 treesize of output 7 [2021-07-09 17:52:47,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:47,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:47,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:47,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-09 17:52:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203940574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:48,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:48,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:52:48,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419547443] [2021-07-09 17:52:48,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:48,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:48,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:48,045 INFO L87 Difference]: Start difference. First operand 2475 states and 10627 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:48,194 INFO L93 Difference]: Finished difference Result 2936 states and 12367 transitions. [2021-07-09 17:52:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:52:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 29 [2021-07-09 17:52:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:48,202 INFO L225 Difference]: With dead ends: 2936 [2021-07-09 17:52:48,202 INFO L226 Difference]: Without dead ends: 2911 [2021-07-09 17:52:48,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-09 17:52:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2395. [2021-07-09 17:52:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 4.302005012531328) internal successors, (10299), 2394 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 10299 transitions. [2021-07-09 17:52:48,240 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 10299 transitions. Word has length 29 [2021-07-09 17:52:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:48,240 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 10299 transitions. [2021-07-09 17:52:48,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 10299 transitions. [2021-07-09 17:52:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:48,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:48,244 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] [2021-07-09 17:52:48,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:48,445 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2122928432, now seen corresponding path program 23 times [2021-07-09 17:52:48,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:48,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183697943] [2021-07-09 17:52:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183697943] [2021-07-09 17:52:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183697943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421187662] [2021-07-09 17:52:48,599 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 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 [2021-07-09 17:52:48,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:52:48,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:52:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:48,677 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 [2021-07-09 17:52:48,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:48,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:48,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:48,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-07-09 17:52:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421187662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:48,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:48,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:52:48,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283832319] [2021-07-09 17:52:48,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:52:48,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:52:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:48,784 INFO L87 Difference]: Start difference. First operand 2395 states and 10299 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,005 INFO L93 Difference]: Finished difference Result 2541 states and 10795 transitions. [2021-07-09 17:52:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:52:49,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 29 [2021-07-09 17:52:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,011 INFO L225 Difference]: With dead ends: 2541 [2021-07-09 17:52:49,011 INFO L226 Difference]: Without dead ends: 2522 [2021-07-09 17:52:49,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-07-09 17:52:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2392. [2021-07-09 17:52:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 4.303638644918444) internal successors, (10290), 2391 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 10290 transitions. [2021-07-09 17:52:49,048 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 10290 transitions. Word has length 29 [2021-07-09 17:52:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,049 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 10290 transitions. [2021-07-09 17:52:49,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2021-07-09 17:52:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 10290 transitions. [2021-07-09 17:52:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:49,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,053 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] [2021-07-09 17:52:49,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 17:52:49,253 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -918912018, now seen corresponding path program 1 times [2021-07-09 17:52:49,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683537589] [2021-07-09 17:52:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683537589] [2021-07-09 17:52:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683537589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136028861] [2021-07-09 17:52:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:52:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:49,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:49,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:49,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:49,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:49,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-07-09 17:52:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136028861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:49,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:49,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:52:49,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598423370] [2021-07-09 17:52:49,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:52:49,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:52:49,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:52:49,553 INFO L87 Difference]: Start difference. First operand 2392 states and 10290 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2021-07-09 17:52:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,840 INFO L93 Difference]: Finished difference Result 2644 states and 11188 transitions. [2021-07-09 17:52:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:52:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 29 [2021-07-09 17:52:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,847 INFO L225 Difference]: With dead ends: 2644 [2021-07-09 17:52:49,847 INFO L226 Difference]: Without dead ends: 2625 [2021-07-09 17:52:49,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:52:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-07-09 17:52:49,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2494. [2021-07-09 17:52:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 4.292418772563177) internal successors, (10701), 2493 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10701 transitions. [2021-07-09 17:52:49,885 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10701 transitions. Word has length 29 [2021-07-09 17:52:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,885 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10701 transitions. [2021-07-09 17:52:49,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2021-07-09 17:52:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10701 transitions. [2021-07-09 17:52:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:49,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,889 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] [2021-07-09 17:52:50,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:50,093 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash -923682226, now seen corresponding path program 1 times [2021-07-09 17:52:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:50,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884772830] [2021-07-09 17:52:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:50,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884772830] [2021-07-09 17:52:50,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884772830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104597516] [2021-07-09 17:52:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:52:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:50,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:50,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:50,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:50,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:50,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:50,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-07-09 17:52:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104597516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:50,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:50,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 17:52:50,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511562863] [2021-07-09 17:52:50,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:52:50,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:52:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:52:50,367 INFO L87 Difference]: Start difference. First operand 2494 states and 10701 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-07-09 17:52:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:50,588 INFO L93 Difference]: Finished difference Result 2653 states and 11209 transitions. [2021-07-09 17:52:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:52:50,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 29 [2021-07-09 17:52:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:50,595 INFO L225 Difference]: With dead ends: 2653 [2021-07-09 17:52:50,595 INFO L226 Difference]: Without dead ends: 2634 [2021-07-09 17:52:50,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-07-09 17:52:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2496. [2021-07-09 17:52:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 4.292184368737475) internal successors, (10709), 2495 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10709 transitions. [2021-07-09 17:52:50,634 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10709 transitions. Word has length 29 [2021-07-09 17:52:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:50,634 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10709 transitions. [2021-07-09 17:52:50,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-07-09 17:52:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10709 transitions. [2021-07-09 17:52:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:50,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:50,638 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] [2021-07-09 17:52:50,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:52:50,845 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1926683450, now seen corresponding path program 2 times [2021-07-09 17:52:50,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:50,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474966792] [2021-07-09 17:52:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:50,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:50,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474966792] [2021-07-09 17:52:50,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474966792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:50,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909319398] [2021-07-09 17:52:50,997 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 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 [2021-07-09 17:52:51,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:51,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:51,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:51,134 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 [2021-07-09 17:52:51,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:51,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:51,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:51,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:52:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:51,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909319398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:51,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:51,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:52:51,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955308199] [2021-07-09 17:52:51,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:51,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:51,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:51,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:51,230 INFO L87 Difference]: Start difference. First operand 2496 states and 10709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:51,858 INFO L93 Difference]: Finished difference Result 2859 states and 12086 transitions. [2021-07-09 17:52:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:51,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:51,865 INFO L225 Difference]: With dead ends: 2859 [2021-07-09 17:52:51,865 INFO L226 Difference]: Without dead ends: 2840 [2021-07-09 17:52:51,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:52:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-07-09 17:52:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2526. [2021-07-09 17:52:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 4.295049504950495) internal successors, (10845), 2525 states have internal predecessors, (10845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 10845 transitions. [2021-07-09 17:52:51,902 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 10845 transitions. Word has length 29 [2021-07-09 17:52:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:51,902 INFO L482 AbstractCegarLoop]: Abstraction has 2526 states and 10845 transitions. [2021-07-09 17:52:51,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 10845 transitions. [2021-07-09 17:52:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:51,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:51,906 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] [2021-07-09 17:52:52,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:52:52,107 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1804686422, now seen corresponding path program 3 times [2021-07-09 17:52:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:52,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363340315] [2021-07-09 17:52:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:52,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363340315] [2021-07-09 17:52:52,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363340315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987445753] [2021-07-09 17:52:52,246 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 [2021-07-09 17:52:52,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:52,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:52,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:52,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:52,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:52,376 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 13 treesize of output 17 [2021-07-09 17:52:52,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:52,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:52,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:52,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:52,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987445753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:52,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:52,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:52:52,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843154912] [2021-07-09 17:52:52,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:52,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:52,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:52,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:52,473 INFO L87 Difference]: Start difference. First operand 2526 states and 10845 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:53,223 INFO L93 Difference]: Finished difference Result 3102 states and 12904 transitions. [2021-07-09 17:52:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:53,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:53,232 INFO L225 Difference]: With dead ends: 3102 [2021-07-09 17:52:53,232 INFO L226 Difference]: Without dead ends: 3064 [2021-07-09 17:52:53,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:52:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-07-09 17:52:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2589. [2021-07-09 17:52:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 4.299459041731066) internal successors, (11127), 2588 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 11127 transitions. [2021-07-09 17:52:53,276 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 11127 transitions. Word has length 29 [2021-07-09 17:52:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:53,276 INFO L482 AbstractCegarLoop]: Abstraction has 2589 states and 11127 transitions. [2021-07-09 17:52:53,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 11127 transitions. [2021-07-09 17:52:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:53,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:53,280 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] [2021-07-09 17:52:53,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:52:53,481 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1433461416, now seen corresponding path program 4 times [2021-07-09 17:52:53,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:53,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155249965] [2021-07-09 17:52:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:53,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:53,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155249965] [2021-07-09 17:52:53,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155249965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:53,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55377875] [2021-07-09 17:52:53,633 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 [2021-07-09 17:52:53,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:53,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:53,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:53,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:53,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:53,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 17:52:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:53,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55377875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:53,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:53,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-09 17:52:53,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550184095] [2021-07-09 17:52:53,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:52:53,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:52:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:52:53,773 INFO L87 Difference]: Start difference. First operand 2589 states and 11127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:52:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:54,061 INFO L93 Difference]: Finished difference Result 3136 states and 13219 transitions. [2021-07-09 17:52:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:52:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-07-09 17:52:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:54,069 INFO L225 Difference]: With dead ends: 3136 [2021-07-09 17:52:54,070 INFO L226 Difference]: Without dead ends: 3121 [2021-07-09 17:52:54,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-07-09 17:52:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2605. [2021-07-09 17:52:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 4.29147465437788) internal successors, (11175), 2604 states have internal predecessors, (11175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 11175 transitions. [2021-07-09 17:52:54,117 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 11175 transitions. Word has length 29 [2021-07-09 17:52:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:54,117 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 11175 transitions. [2021-07-09 17:52:54,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:52:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 11175 transitions. [2021-07-09 17:52:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:54,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:54,121 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] [2021-07-09 17:52:54,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:54,322 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash -234932026, now seen corresponding path program 5 times [2021-07-09 17:52:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:54,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751475700] [2021-07-09 17:52:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:54,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751475700] [2021-07-09 17:52:54,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751475700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419059433] [2021-07-09 17:52:54,458 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 [2021-07-09 17:52:54,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:54,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:54,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:54,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:54,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:54,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 17:52:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:54,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419059433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:54,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:54,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-09 17:52:54,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271984502] [2021-07-09 17:52:54,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:52:54,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:52:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:52:54,609 INFO L87 Difference]: Start difference. First operand 2605 states and 11175 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:52:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:54,892 INFO L93 Difference]: Finished difference Result 3149 states and 13269 transitions. [2021-07-09 17:52:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:52:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-07-09 17:52:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:54,900 INFO L225 Difference]: With dead ends: 3149 [2021-07-09 17:52:54,900 INFO L226 Difference]: Without dead ends: 3123 [2021-07-09 17:52:54,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:52:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-07-09 17:52:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2510. [2021-07-09 17:52:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2509 states have (on average 4.302909525707453) internal successors, (10796), 2509 states have internal predecessors, (10796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 10796 transitions. [2021-07-09 17:52:54,942 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 10796 transitions. Word has length 29 [2021-07-09 17:52:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:54,943 INFO L482 AbstractCegarLoop]: Abstraction has 2510 states and 10796 transitions. [2021-07-09 17:52:54,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:52:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 10796 transitions. [2021-07-09 17:52:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:54,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:54,947 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] [2021-07-09 17:52:55,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:55,149 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1340011206, now seen corresponding path program 2 times [2021-07-09 17:52:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:55,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445791760] [2021-07-09 17:52:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:55,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:55,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445791760] [2021-07-09 17:52:55,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445791760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:55,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097883147] [2021-07-09 17:52:55,279 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 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 [2021-07-09 17:52:55,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:55,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:55,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:55,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:55,404 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-07-09 17:52:55,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:55,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:55,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:55,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097883147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:55,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:55,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:52:55,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135713760] [2021-07-09 17:52:55,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:55,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:55,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:55,507 INFO L87 Difference]: Start difference. First operand 2510 states and 10796 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:56,153 INFO L93 Difference]: Finished difference Result 3041 states and 12779 transitions. [2021-07-09 17:52:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:56,161 INFO L225 Difference]: With dead ends: 3041 [2021-07-09 17:52:56,161 INFO L226 Difference]: Without dead ends: 3022 [2021-07-09 17:52:56,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:52:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-07-09 17:52:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2540. [2021-07-09 17:52:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.301693580149665) internal successors, (10922), 2539 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 10922 transitions. [2021-07-09 17:52:56,204 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 10922 transitions. Word has length 29 [2021-07-09 17:52:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:56,204 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 10922 transitions. [2021-07-09 17:52:56,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 10922 transitions. [2021-07-09 17:52:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:56,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:56,208 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] [2021-07-09 17:52:56,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:56,409 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -364239170, now seen corresponding path program 3 times [2021-07-09 17:52:56,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:56,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396095231] [2021-07-09 17:52:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:56,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:56,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396095231] [2021-07-09 17:52:56,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396095231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:56,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618610623] [2021-07-09 17:52:56,497 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 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 [2021-07-09 17:52:56,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:52:56,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:56,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:56,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:56,617 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 13 treesize of output 17 [2021-07-09 17:52:56,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:56,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:56,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:56,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:52:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:56,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618610623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:56,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:56,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:52:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903774808] [2021-07-09 17:52:56,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:56,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:56,714 INFO L87 Difference]: Start difference. First operand 2540 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:57,390 INFO L93 Difference]: Finished difference Result 3595 states and 14868 transitions. [2021-07-09 17:52:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:52:57,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:57,399 INFO L225 Difference]: With dead ends: 3595 [2021-07-09 17:52:57,400 INFO L226 Difference]: Without dead ends: 3557 [2021-07-09 17:52:57,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:52:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-07-09 17:52:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2640. [2021-07-09 17:52:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 4.297082228116711) internal successors, (11340), 2639 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 11340 transitions. [2021-07-09 17:52:57,448 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 11340 transitions. Word has length 29 [2021-07-09 17:52:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:57,449 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 11340 transitions. [2021-07-09 17:52:57,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 11340 transitions. [2021-07-09 17:52:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:57,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:57,453 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] [2021-07-09 17:52:57,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 17:52:57,657 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1058115656, now seen corresponding path program 4 times [2021-07-09 17:52:57,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:57,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318632219] [2021-07-09 17:52:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:57,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:57,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318632219] [2021-07-09 17:52:57,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318632219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:57,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419550036] [2021-07-09 17:52:57,750 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 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 [2021-07-09 17:52:57,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:52:57,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:57,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:57,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:57,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 17:52:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:57,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419550036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:57,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:57,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 17:52:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409559346] [2021-07-09 17:52:57,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:52:57,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:52:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:52:57,885 INFO L87 Difference]: Start difference. First operand 2640 states and 11340 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:52:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:58,128 INFO L93 Difference]: Finished difference Result 3227 states and 13608 transitions. [2021-07-09 17:52:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:52:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 29 [2021-07-09 17:52:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:58,137 INFO L225 Difference]: With dead ends: 3227 [2021-07-09 17:52:58,137 INFO L226 Difference]: Without dead ends: 3196 [2021-07-09 17:52:58,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:52:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-07-09 17:52:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2492. [2021-07-09 17:52:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 4.308711360899237) internal successors, (10733), 2491 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 10733 transitions. [2021-07-09 17:52:58,181 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 10733 transitions. Word has length 29 [2021-07-09 17:52:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:58,181 INFO L482 AbstractCegarLoop]: Abstraction has 2492 states and 10733 transitions. [2021-07-09 17:52:58,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:52:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 10733 transitions. [2021-07-09 17:52:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:58,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:58,186 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] [2021-07-09 17:52:58,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:58,386 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 6 times [2021-07-09 17:52:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:58,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884262326] [2021-07-09 17:52:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:58,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:58,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884262326] [2021-07-09 17:52:58,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884262326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:58,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497071703] [2021-07-09 17:52:58,509 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 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 [2021-07-09 17:52:58,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:52:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:58,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:58,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 17:52:58,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:52:58,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:58,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:58,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:52:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497071703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:58,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:58,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:52:58,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207777022] [2021-07-09 17:52:58,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:58,740 INFO L87 Difference]: Start difference. First operand 2492 states and 10733 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:59,493 INFO L93 Difference]: Finished difference Result 3028 states and 12675 transitions. [2021-07-09 17:52:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:52:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:52:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:59,501 INFO L225 Difference]: With dead ends: 3028 [2021-07-09 17:52:59,501 INFO L226 Difference]: Without dead ends: 3009 [2021-07-09 17:52:59,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:52:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-07-09 17:52:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2591. [2021-07-09 17:52:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2590 states have (on average 4.316602316602316) internal successors, (11180), 2590 states have internal predecessors, (11180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 11180 transitions. [2021-07-09 17:52:59,548 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 11180 transitions. Word has length 29 [2021-07-09 17:52:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:59,549 INFO L482 AbstractCegarLoop]: Abstraction has 2591 states and 11180 transitions. [2021-07-09 17:52:59,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 11180 transitions. [2021-07-09 17:52:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:52:59,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:59,553 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] [2021-07-09 17:52:59,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:59,758 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 7 times [2021-07-09 17:52:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:59,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519928027] [2021-07-09 17:52:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:59,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519928027] [2021-07-09 17:52:59,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519928027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137565827] [2021-07-09 17:52:59,885 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 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 [2021-07-09 17:52:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:59,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:59,955 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 13 treesize of output 7 [2021-07-09 17:52:59,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:59,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:59,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:52:59,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-09 17:53:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:00,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137565827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:00,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:00,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-09 17:53:00,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357045670] [2021-07-09 17:53:00,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:00,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:00,022 INFO L87 Difference]: Start difference. First operand 2591 states and 11180 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:53:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:00,247 INFO L93 Difference]: Finished difference Result 3061 states and 12960 transitions. [2021-07-09 17:53:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-07-09 17:53:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:00,256 INFO L225 Difference]: With dead ends: 3061 [2021-07-09 17:53:00,256 INFO L226 Difference]: Without dead ends: 3046 [2021-07-09 17:53:00,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-07-09 17:53:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2610. [2021-07-09 17:53:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 4.3073974702951325) internal successors, (11238), 2609 states have internal predecessors, (11238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 11238 transitions. [2021-07-09 17:53:00,299 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 11238 transitions. Word has length 29 [2021-07-09 17:53:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:00,299 INFO L482 AbstractCegarLoop]: Abstraction has 2610 states and 11238 transitions. [2021-07-09 17:53:00,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:53:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 11238 transitions. [2021-07-09 17:53:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:00,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:00,304 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] [2021-07-09 17:53:00,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:00,504 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:00,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 8 times [2021-07-09 17:53:00,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:00,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761991921] [2021-07-09 17:53:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:00,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:00,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761991921] [2021-07-09 17:53:00,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761991921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:00,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819544092] [2021-07-09 17:53:00,625 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 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 [2021-07-09 17:53:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:00,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:00,711 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 [2021-07-09 17:53:00,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:00,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:00,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:00,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:00,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819544092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:00,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:00,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:53:00,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401471318] [2021-07-09 17:53:00,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:00,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:00,825 INFO L87 Difference]: Start difference. First operand 2610 states and 11238 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:01,501 INFO L93 Difference]: Finished difference Result 3023 states and 12668 transitions. [2021-07-09 17:53:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:53:01,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-07-09 17:53:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:01,509 INFO L225 Difference]: With dead ends: 3023 [2021-07-09 17:53:01,509 INFO L226 Difference]: Without dead ends: 3009 [2021-07-09 17:53:01,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:53:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-07-09 17:53:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2603. [2021-07-09 17:53:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 4.309761721752498) internal successors, (11214), 2602 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 11214 transitions. [2021-07-09 17:53:01,553 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 11214 transitions. Word has length 29 [2021-07-09 17:53:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:01,553 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 11214 transitions. [2021-07-09 17:53:01,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 11214 transitions. [2021-07-09 17:53:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:01,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:01,558 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, 1, 1, 1] [2021-07-09 17:53:01,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 17:53:01,758 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 9 times [2021-07-09 17:53:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:01,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735579263] [2021-07-09 17:53:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:01,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:01,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735579263] [2021-07-09 17:53:01,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735579263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:01,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926730301] [2021-07-09 17:53:01,895 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 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 [2021-07-09 17:53:01,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:53:01,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:01,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:01,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:01,979 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 [2021-07-09 17:53:01,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:01,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:01,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:01,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:02,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926730301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:02,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:02,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:53:02,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422736683] [2021-07-09 17:53:02,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:02,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:02,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:02,095 INFO L87 Difference]: Start difference. First operand 2603 states and 11214 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:02,653 INFO L93 Difference]: Finished difference Result 2991 states and 12597 transitions. [2021-07-09 17:53:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-07-09 17:53:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:02,660 INFO L225 Difference]: With dead ends: 2991 [2021-07-09 17:53:02,661 INFO L226 Difference]: Without dead ends: 2968 [2021-07-09 17:53:02,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:53:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-07-09 17:53:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2531. [2021-07-09 17:53:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.311462450592885) internal successors, (10908), 2530 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 10908 transitions. [2021-07-09 17:53:02,702 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 10908 transitions. Word has length 29 [2021-07-09 17:53:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:02,702 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 10908 transitions. [2021-07-09 17:53:02,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 10908 transitions. [2021-07-09 17:53:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:02,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:02,707 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] [2021-07-09 17:53:02,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:02,907 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 10 times [2021-07-09 17:53:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:02,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054571033] [2021-07-09 17:53:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:03,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:03,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054571033] [2021-07-09 17:53:03,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054571033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:03,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677118176] [2021-07-09 17:53:03,033 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 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 [2021-07-09 17:53:03,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:03,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:03,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:03,116 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 13 treesize of output 7 [2021-07-09 17:53:03,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:03,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:03,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:03,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-09 17:53:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677118176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:03,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:03,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:53:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509126973] [2021-07-09 17:53:03,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:53:03,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:53:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:53:03,200 INFO L87 Difference]: Start difference. First operand 2531 states and 10908 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2021-07-09 17:53:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:03,447 INFO L93 Difference]: Finished difference Result 2666 states and 11389 transitions. [2021-07-09 17:53:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 29 [2021-07-09 17:53:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:03,454 INFO L225 Difference]: With dead ends: 2666 [2021-07-09 17:53:03,455 INFO L226 Difference]: Without dead ends: 2647 [2021-07-09 17:53:03,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-07-09 17:53:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2531. [2021-07-09 17:53:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.311462450592885) internal successors, (10908), 2530 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 10908 transitions. [2021-07-09 17:53:03,494 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 10908 transitions. Word has length 29 [2021-07-09 17:53:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:03,494 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 10908 transitions. [2021-07-09 17:53:03,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2021-07-09 17:53:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 10908 transitions. [2021-07-09 17:53:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:03,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:03,498 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] [2021-07-09 17:53:03,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:03,699 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:03,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 11 times [2021-07-09 17:53:03,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:03,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548058561] [2021-07-09 17:53:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:03,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:03,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548058561] [2021-07-09 17:53:03,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548058561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:03,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790092777] [2021-07-09 17:53:03,832 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 [2021-07-09 17:53:03,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:03,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:04,003 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 [2021-07-09 17:53:04,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:04,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:04,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:04,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-07-09 17:53:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790092777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:04,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:53:04,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585071167] [2021-07-09 17:53:04,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:04,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:04,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:04,104 INFO L87 Difference]: Start difference. First operand 2531 states and 10908 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2021-07-09 17:53:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:04,303 INFO L93 Difference]: Finished difference Result 3018 states and 12763 transitions. [2021-07-09 17:53:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:53:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 29 [2021-07-09 17:53:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:04,311 INFO L225 Difference]: With dead ends: 3018 [2021-07-09 17:53:04,311 INFO L226 Difference]: Without dead ends: 2995 [2021-07-09 17:53:04,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-07-09 17:53:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2501. [2021-07-09 17:53:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 4.3088) internal successors, (10772), 2500 states have internal predecessors, (10772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 10772 transitions. [2021-07-09 17:53:04,354 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 10772 transitions. Word has length 29 [2021-07-09 17:53:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:04,354 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 10772 transitions. [2021-07-09 17:53:04,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2021-07-09 17:53:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 10772 transitions. [2021-07-09 17:53:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:04,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:04,358 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] [2021-07-09 17:53:04,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:53:04,559 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 12 times [2021-07-09 17:53:04,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:04,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717316434] [2021-07-09 17:53:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717316434] [2021-07-09 17:53:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717316434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382172624] [2021-07-09 17:53:04,678 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 [2021-07-09 17:53:04,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:53:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:04,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:04,757 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 [2021-07-09 17:53:04,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:04,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:04,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:04,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-07-09 17:53:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382172624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:04,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:53:04,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611022299] [2021-07-09 17:53:04,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:53:04,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:04,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:53:04,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:04,869 INFO L87 Difference]: Start difference. First operand 2501 states and 10772 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:05,653 INFO L93 Difference]: Finished difference Result 3190 states and 13408 transitions. [2021-07-09 17:53:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:53:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:05,662 INFO L225 Difference]: With dead ends: 3190 [2021-07-09 17:53:05,662 INFO L226 Difference]: Without dead ends: 3171 [2021-07-09 17:53:05,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:53:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-07-09 17:53:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2585. [2021-07-09 17:53:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 4.312693498452012) internal successors, (11144), 2584 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 11144 transitions. [2021-07-09 17:53:05,708 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 11144 transitions. Word has length 29 [2021-07-09 17:53:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:05,708 INFO L482 AbstractCegarLoop]: Abstraction has 2585 states and 11144 transitions. [2021-07-09 17:53:05,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 11144 transitions. [2021-07-09 17:53:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:05,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:05,713 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] [2021-07-09 17:53:05,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:05,913 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 13 times [2021-07-09 17:53:05,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:05,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785592292] [2021-07-09 17:53:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:06,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785592292] [2021-07-09 17:53:06,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785592292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215322327] [2021-07-09 17:53:06,033 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 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 [2021-07-09 17:53:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:06,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:06,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:06,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:06,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:06,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:06,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215322327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:06,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:06,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-09 17:53:06,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403507118] [2021-07-09 17:53:06,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:06,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:06,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:06,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:06,170 INFO L87 Difference]: Start difference. First operand 2585 states and 11144 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:53:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:06,392 INFO L93 Difference]: Finished difference Result 3052 states and 12852 transitions. [2021-07-09 17:53:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-07-09 17:53:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:06,400 INFO L225 Difference]: With dead ends: 3052 [2021-07-09 17:53:06,400 INFO L226 Difference]: Without dead ends: 3037 [2021-07-09 17:53:06,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-07-09 17:53:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2604. [2021-07-09 17:53:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 4.303111794083749) internal successors, (11201), 2603 states have internal predecessors, (11201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 11201 transitions. [2021-07-09 17:53:06,450 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 11201 transitions. Word has length 29 [2021-07-09 17:53:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:06,450 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 11201 transitions. [2021-07-09 17:53:06,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:53:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 11201 transitions. [2021-07-09 17:53:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:06,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:06,455 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] [2021-07-09 17:53:06,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:06,669 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 14 times [2021-07-09 17:53:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:06,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74906770] [2021-07-09 17:53:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:06,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:06,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74906770] [2021-07-09 17:53:06,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74906770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:06,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067148915] [2021-07-09 17:53:06,789 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 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 [2021-07-09 17:53:06,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:06,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:06,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:06,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:06,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 17:53:06,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:06,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:06,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:06,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:07,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067148915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:07,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:07,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:53:07,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589362593] [2021-07-09 17:53:07,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:07,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:07,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:07,013 INFO L87 Difference]: Start difference. First operand 2604 states and 11201 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:07,634 INFO L93 Difference]: Finished difference Result 2956 states and 12436 transitions. [2021-07-09 17:53:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:53:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-07-09 17:53:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:07,643 INFO L225 Difference]: With dead ends: 2956 [2021-07-09 17:53:07,643 INFO L226 Difference]: Without dead ends: 2942 [2021-07-09 17:53:07,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:53:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-09 17:53:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2597. [2021-07-09 17:53:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.305469953775039) internal successors, (11177), 2596 states have internal predecessors, (11177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11177 transitions. [2021-07-09 17:53:07,694 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11177 transitions. Word has length 29 [2021-07-09 17:53:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:07,694 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 11177 transitions. [2021-07-09 17:53:07,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11177 transitions. [2021-07-09 17:53:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:07,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:07,699 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] [2021-07-09 17:53:07,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:07,913 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 15 times [2021-07-09 17:53:07,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:07,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482839789] [2021-07-09 17:53:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:08,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482839789] [2021-07-09 17:53:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482839789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784622830] [2021-07-09 17:53:08,044 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 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 [2021-07-09 17:53:08,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:08,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:53:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:08,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:08,127 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 [2021-07-09 17:53:08,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:08,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:08,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:08,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:53:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:08,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784622830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:08,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:08,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:53:08,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818352984] [2021-07-09 17:53:08,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:08,228 INFO L87 Difference]: Start difference. First operand 2597 states and 11177 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:08,755 INFO L93 Difference]: Finished difference Result 3119 states and 13036 transitions. [2021-07-09 17:53:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:08,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-07-09 17:53:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:08,763 INFO L225 Difference]: With dead ends: 3119 [2021-07-09 17:53:08,763 INFO L226 Difference]: Without dead ends: 3096 [2021-07-09 17:53:08,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:53:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-07-09 17:53:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2534. [2021-07-09 17:53:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-07-09 17:53:08,808 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-07-09 17:53:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:08,809 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-07-09 17:53:08,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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) [2021-07-09 17:53:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-07-09 17:53:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:08,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:08,814 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] [2021-07-09 17:53:09,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:09,015 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 16 times [2021-07-09 17:53:09,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:09,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364641423] [2021-07-09 17:53:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:09,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364641423] [2021-07-09 17:53:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364641423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428332434] [2021-07-09 17:53:09,139 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 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 [2021-07-09 17:53:09,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:09,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:09,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:09,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:09,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:09,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:09,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:09,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428332434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:09,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:09,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:53:09,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506532193] [2021-07-09 17:53:09,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:53:09,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:53:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:53:09,306 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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) [2021-07-09 17:53:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:09,542 INFO L93 Difference]: Finished difference Result 2643 states and 11266 transitions. [2021-07-09 17:53:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:09,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 29 [2021-07-09 17:53:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:09,549 INFO L225 Difference]: With dead ends: 2643 [2021-07-09 17:53:09,549 INFO L226 Difference]: Without dead ends: 2628 [2021-07-09 17:53:09,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-07-09 17:53:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2534. [2021-07-09 17:53:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-07-09 17:53:09,594 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-07-09 17:53:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:09,594 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-07-09 17:53:09,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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) [2021-07-09 17:53:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-07-09 17:53:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:09,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:09,599 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] [2021-07-09 17:53:09,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:09,800 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:09,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:09,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 17 times [2021-07-09 17:53:09,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:09,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534184563] [2021-07-09 17:53:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:09,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:09,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534184563] [2021-07-09 17:53:09,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534184563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:09,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051729550] [2021-07-09 17:53:09,920 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 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 [2021-07-09 17:53:09,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:53:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:09,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:09,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:09,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:09,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:09,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:09,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051729550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:10,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-07-09 17:53:10,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357196360] [2021-07-09 17:53:10,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:10,062 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:53:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:10,263 INFO L93 Difference]: Finished difference Result 2986 states and 12678 transitions. [2021-07-09 17:53:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-07-09 17:53:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:10,297 INFO L225 Difference]: With dead ends: 2986 [2021-07-09 17:53:10,297 INFO L226 Difference]: Without dead ends: 2972 [2021-07-09 17:53:10,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-07-09 17:53:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2522. [2021-07-09 17:53:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-07-09 17:53:10,344 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-07-09 17:53:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:10,344 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-07-09 17:53:10,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-07-09 17:53:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-07-09 17:53:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:10,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:10,349 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] [2021-07-09 17:53:10,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:10,561 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-07-09 17:53:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:10,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912877252] [2021-07-09 17:53:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:10,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:10,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912877252] [2021-07-09 17:53:10,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912877252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:10,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406777989] [2021-07-09 17:53:10,685 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 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 [2021-07-09 17:53:10,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:53:10,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:10,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:10,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:10,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:10,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:10,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:10,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406777989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:10,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:10,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 17:53:10,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788379198] [2021-07-09 17:53:10,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:10,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:10,826 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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) [2021-07-09 17:53:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:11,104 INFO L93 Difference]: Finished difference Result 3129 states and 13232 transitions. [2021-07-09 17:53:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 29 [2021-07-09 17:53:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:11,113 INFO L225 Difference]: With dead ends: 3129 [2021-07-09 17:53:11,113 INFO L226 Difference]: Without dead ends: 3110 [2021-07-09 17:53:11,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-07-09 17:53:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2661. [2021-07-09 17:53:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.300375939849624) internal successors, (11439), 2660 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11439 transitions. [2021-07-09 17:53:11,159 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11439 transitions. Word has length 29 [2021-07-09 17:53:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:11,159 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 11439 transitions. [2021-07-09 17:53:11,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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) [2021-07-09 17:53:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11439 transitions. [2021-07-09 17:53:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:11,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:11,164 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] [2021-07-09 17:53:11,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 17:53:11,364 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-07-09 17:53:11,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:11,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216369077] [2021-07-09 17:53:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:11,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216369077] [2021-07-09 17:53:11,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216369077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991072672] [2021-07-09 17:53:11,493 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 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 [2021-07-09 17:53:11,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:53:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:11,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:11,572 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 [2021-07-09 17:53:11,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:11,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:11,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:11,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:53:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:11,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991072672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:11,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:11,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 17:53:11,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266380621] [2021-07-09 17:53:11,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:11,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:11,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:11,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:11,678 INFO L87 Difference]: Start difference. First operand 2661 states and 11439 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2021-07-09 17:53:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:12,180 INFO L93 Difference]: Finished difference Result 3480 states and 14546 transitions. [2021-07-09 17:53:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:12,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-07-09 17:53:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:12,189 INFO L225 Difference]: With dead ends: 3480 [2021-07-09 17:53:12,190 INFO L226 Difference]: Without dead ends: 3449 [2021-07-09 17:53:12,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:53:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-07-09 17:53:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2561. [2021-07-09 17:53:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 4.305078125) internal successors, (11021), 2560 states have internal predecessors, (11021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 11021 transitions. [2021-07-09 17:53:12,238 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 11021 transitions. Word has length 29 [2021-07-09 17:53:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:12,238 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 11021 transitions. [2021-07-09 17:53:12,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2021-07-09 17:53:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 11021 transitions. [2021-07-09 17:53:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:12,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:12,242 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] [2021-07-09 17:53:12,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:12,443 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-07-09 17:53:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:12,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288728364] [2021-07-09 17:53:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:12,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:12,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288728364] [2021-07-09 17:53:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288728364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:12,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759127120] [2021-07-09 17:53:12,566 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 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 [2021-07-09 17:53:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:12,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:12,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:12,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:12,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:12,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:12,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:12,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759127120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:12,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:12,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:53:12,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780357861] [2021-07-09 17:53:12,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:12,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:12,728 INFO L87 Difference]: Start difference. First operand 2561 states and 11021 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-07-09 17:53:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:13,009 INFO L93 Difference]: Finished difference Result 2679 states and 11423 transitions. [2021-07-09 17:53:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:53:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 29 [2021-07-09 17:53:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:13,015 INFO L225 Difference]: With dead ends: 2679 [2021-07-09 17:53:13,015 INFO L226 Difference]: Without dead ends: 2664 [2021-07-09 17:53:13,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-07-09 17:53:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2537. [2021-07-09 17:53:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 4.306782334384858) internal successors, (10922), 2536 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 10922 transitions. [2021-07-09 17:53:13,051 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 10922 transitions. Word has length 29 [2021-07-09 17:53:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:13,051 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 10922 transitions. [2021-07-09 17:53:13,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-07-09 17:53:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 10922 transitions. [2021-07-09 17:53:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:13,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:13,055 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] [2021-07-09 17:53:13,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 17:53:13,256 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:13,256 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-07-09 17:53:13,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:13,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872559732] [2021-07-09 17:53:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:13,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872559732] [2021-07-09 17:53:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872559732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178351403] [2021-07-09 17:53:13,380 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 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 [2021-07-09 17:53:13,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:13,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:13,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:13,461 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 [2021-07-09 17:53:13,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:13,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:13,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:13,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:13,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178351403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:13,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:13,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:53:13,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993529000] [2021-07-09 17:53:13,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:13,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:13,594 INFO L87 Difference]: Start difference. First operand 2537 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:14,616 INFO L93 Difference]: Finished difference Result 3319 states and 13757 transitions. [2021-07-09 17:53:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:53:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:14,625 INFO L225 Difference]: With dead ends: 3319 [2021-07-09 17:53:14,625 INFO L226 Difference]: Without dead ends: 3273 [2021-07-09 17:53:14,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:53:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-07-09 17:53:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2685. [2021-07-09 17:53:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 4.2831594634873325) internal successors, (11496), 2684 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 11496 transitions. [2021-07-09 17:53:14,671 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 11496 transitions. Word has length 29 [2021-07-09 17:53:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:14,671 INFO L482 AbstractCegarLoop]: Abstraction has 2685 states and 11496 transitions. [2021-07-09 17:53:14,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 11496 transitions. [2021-07-09 17:53:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:14,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:14,675 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] [2021-07-09 17:53:14,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:53:14,876 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:14,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-07-09 17:53:14,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:14,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699367507] [2021-07-09 17:53:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:15,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699367507] [2021-07-09 17:53:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699367507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394468797] [2021-07-09 17:53:15,028 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 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 [2021-07-09 17:53:15,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:15,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:53:15,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:15,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:15,105 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 [2021-07-09 17:53:15,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:15,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:15,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:15,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:53:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:15,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394468797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:15,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:15,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 17:53:15,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160819858] [2021-07-09 17:53:15,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:15,209 INFO L87 Difference]: Start difference. First operand 2685 states and 11496 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2021-07-09 17:53:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:15,639 INFO L93 Difference]: Finished difference Result 3480 states and 14560 transitions. [2021-07-09 17:53:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-07-09 17:53:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:15,647 INFO L225 Difference]: With dead ends: 3480 [2021-07-09 17:53:15,647 INFO L226 Difference]: Without dead ends: 3407 [2021-07-09 17:53:15,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:53:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-07-09 17:53:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 2621. [2021-07-09 17:53:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.307251908396947) internal successors, (11285), 2620 states have internal predecessors, (11285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11285 transitions. [2021-07-09 17:53:15,693 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11285 transitions. Word has length 29 [2021-07-09 17:53:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:15,693 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11285 transitions. [2021-07-09 17:53:15,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2021-07-09 17:53:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11285 transitions. [2021-07-09 17:53:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:15,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:15,697 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] [2021-07-09 17:53:15,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:15,898 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash 794590770, now seen corresponding path program 10 times [2021-07-09 17:53:15,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:15,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192381342] [2021-07-09 17:53:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:16,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:16,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192381342] [2021-07-09 17:53:16,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192381342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:16,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718842482] [2021-07-09 17:53:16,011 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 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 [2021-07-09 17:53:16,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:16,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 17:53:16,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:16,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:16,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:16,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 17:53:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718842482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:16,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:16,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 17:53:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989502752] [2021-07-09 17:53:16,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:16,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:16,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:16,136 INFO L87 Difference]: Start difference. First operand 2621 states and 11285 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:53:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:16,380 INFO L93 Difference]: Finished difference Result 2765 states and 11775 transitions. [2021-07-09 17:53:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:53:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 29 [2021-07-09 17:53:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:16,387 INFO L225 Difference]: With dead ends: 2765 [2021-07-09 17:53:16,387 INFO L226 Difference]: Without dead ends: 2746 [2021-07-09 17:53:16,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-07-09 17:53:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2021-07-09 17:53:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 4.30875047764616) internal successors, (11276), 2617 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 11276 transitions. [2021-07-09 17:53:16,428 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 11276 transitions. Word has length 29 [2021-07-09 17:53:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:16,428 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 11276 transitions. [2021-07-09 17:53:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:53:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 11276 transitions. [2021-07-09 17:53:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:16,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:16,433 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] [2021-07-09 17:53:16,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:16,633 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 18 times [2021-07-09 17:53:16,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:16,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443384366] [2021-07-09 17:53:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:16,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443384366] [2021-07-09 17:53:16,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443384366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114344541] [2021-07-09 17:53:16,703 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 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 [2021-07-09 17:53:16,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:53:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:16,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:16,781 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 [2021-07-09 17:53:16,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:16,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:16,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:16,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-07-09 17:53:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:16,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114344541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:16,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:16,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:53:16,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892086712] [2021-07-09 17:53:16,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:16,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:16,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:16,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:16,889 INFO L87 Difference]: Start difference. First operand 2618 states and 11276 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:17,342 INFO L93 Difference]: Finished difference Result 3558 states and 14884 transitions. [2021-07-09 17:53:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:53:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:17,351 INFO L225 Difference]: With dead ends: 3558 [2021-07-09 17:53:17,351 INFO L226 Difference]: Without dead ends: 3539 [2021-07-09 17:53:17,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:53:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2021-07-09 17:53:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 2740. [2021-07-09 17:53:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 4.306316173786053) internal successors, (11795), 2739 states have internal predecessors, (11795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 11795 transitions. [2021-07-09 17:53:17,397 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 11795 transitions. Word has length 29 [2021-07-09 17:53:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:17,397 INFO L482 AbstractCegarLoop]: Abstraction has 2740 states and 11795 transitions. [2021-07-09 17:53:17,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 11795 transitions. [2021-07-09 17:53:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:17,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:17,402 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] [2021-07-09 17:53:17,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:17,602 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 19 times [2021-07-09 17:53:17,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:17,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476035586] [2021-07-09 17:53:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:17,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476035586] [2021-07-09 17:53:17,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476035586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73928759] [2021-07-09 17:53:17,672 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 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 [2021-07-09 17:53:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:17,727 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 [2021-07-09 17:53:17,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:17,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:17,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:17,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-07-09 17:53:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:17,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73928759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:17,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:17,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-07-09 17:53:17,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404518367] [2021-07-09 17:53:17,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:17,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:17,822 INFO L87 Difference]: Start difference. First operand 2740 states and 11795 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 17:53:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:18,067 INFO L93 Difference]: Finished difference Result 3134 states and 13216 transitions. [2021-07-09 17:53:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 29 [2021-07-09 17:53:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:18,075 INFO L225 Difference]: With dead ends: 3134 [2021-07-09 17:53:18,075 INFO L226 Difference]: Without dead ends: 3054 [2021-07-09 17:53:18,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-07-09 17:53:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2695. [2021-07-09 17:53:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 4.310690423162583) internal successors, (11613), 2694 states have internal predecessors, (11613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 11613 transitions. [2021-07-09 17:53:18,120 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 11613 transitions. Word has length 29 [2021-07-09 17:53:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:18,120 INFO L482 AbstractCegarLoop]: Abstraction has 2695 states and 11613 transitions. [2021-07-09 17:53:18,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 17:53:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 11613 transitions. [2021-07-09 17:53:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:18,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:18,124 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] [2021-07-09 17:53:18,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 17:53:18,325 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 20 times [2021-07-09 17:53:18,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:18,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919610275] [2021-07-09 17:53:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:18,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919610275] [2021-07-09 17:53:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919610275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425795177] [2021-07-09 17:53:18,398 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 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 [2021-07-09 17:53:18,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:18,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:18,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:53:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:18,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:18,470 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 13 treesize of output 7 [2021-07-09 17:53:18,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:18,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:18,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:18,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-07-09 17:53:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:18,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425795177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:18,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:18,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:53:18,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493690271] [2021-07-09 17:53:18,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:53:18,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:18,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:53:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:53:18,510 INFO L87 Difference]: Start difference. First operand 2695 states and 11613 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:18,673 INFO L93 Difference]: Finished difference Result 2824 states and 12065 transitions. [2021-07-09 17:53:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:18,681 INFO L225 Difference]: With dead ends: 2824 [2021-07-09 17:53:18,681 INFO L226 Difference]: Without dead ends: 2805 [2021-07-09 17:53:18,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-07-09 17:53:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2692. [2021-07-09 17:53:18,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 4.311780007432182) internal successors, (11603), 2691 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 11603 transitions. [2021-07-09 17:53:18,726 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 11603 transitions. Word has length 29 [2021-07-09 17:53:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:18,726 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 11603 transitions. [2021-07-09 17:53:18,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 11603 transitions. [2021-07-09 17:53:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:18,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:18,730 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] [2021-07-09 17:53:18,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:18,931 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 21 times [2021-07-09 17:53:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:18,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464568955] [2021-07-09 17:53:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:19,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:19,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464568955] [2021-07-09 17:53:19,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464568955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:19,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407669543] [2021-07-09 17:53:19,002 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 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 [2021-07-09 17:53:19,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:53:19,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:19,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:19,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:19,093 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 [2021-07-09 17:53:19,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:19,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:19,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:19,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:19,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407669543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:19,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:19,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:53:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943703444] [2021-07-09 17:53:19,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:19,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:19,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:19,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:19,213 INFO L87 Difference]: Start difference. First operand 2692 states and 11603 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:19,677 INFO L93 Difference]: Finished difference Result 3253 states and 13768 transitions. [2021-07-09 17:53:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:19,685 INFO L225 Difference]: With dead ends: 3253 [2021-07-09 17:53:19,685 INFO L226 Difference]: Without dead ends: 3234 [2021-07-09 17:53:19,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-07-09 17:53:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2796. [2021-07-09 17:53:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.308407871198569) internal successors, (12042), 2795 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12042 transitions. [2021-07-09 17:53:19,729 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12042 transitions. Word has length 29 [2021-07-09 17:53:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:19,729 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 12042 transitions. [2021-07-09 17:53:19,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12042 transitions. [2021-07-09 17:53:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:19,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:19,734 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] [2021-07-09 17:53:19,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-09 17:53:19,934 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 22 times [2021-07-09 17:53:19,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:19,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538779191] [2021-07-09 17:53:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:20,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:20,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538779191] [2021-07-09 17:53:20,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538779191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:20,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949892793] [2021-07-09 17:53:20,004 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 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 [2021-07-09 17:53:20,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:20,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:20,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:20,061 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 [2021-07-09 17:53:20,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:20,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:20,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:20,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-07-09 17:53:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:20,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949892793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:20,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:20,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-07-09 17:53:20,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56916750] [2021-07-09 17:53:20,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:20,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:20,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:20,157 INFO L87 Difference]: Start difference. First operand 2796 states and 12042 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 17:53:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:20,377 INFO L93 Difference]: Finished difference Result 3178 states and 13411 transitions. [2021-07-09 17:53:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:53:20,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 29 [2021-07-09 17:53:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:20,385 INFO L225 Difference]: With dead ends: 3178 [2021-07-09 17:53:20,385 INFO L226 Difference]: Without dead ends: 3092 [2021-07-09 17:53:20,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-07-09 17:53:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 2716. [2021-07-09 17:53:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 4.311233885819521) internal successors, (11705), 2715 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 11705 transitions. [2021-07-09 17:53:20,431 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 11705 transitions. Word has length 29 [2021-07-09 17:53:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:20,431 INFO L482 AbstractCegarLoop]: Abstraction has 2716 states and 11705 transitions. [2021-07-09 17:53:20,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-07-09 17:53:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 11705 transitions. [2021-07-09 17:53:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:20,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:20,436 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] [2021-07-09 17:53:20,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:20,636 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 23 times [2021-07-09 17:53:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:20,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953154061] [2021-07-09 17:53:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:20,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:20,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953154061] [2021-07-09 17:53:20,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953154061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:20,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879213917] [2021-07-09 17:53:20,705 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 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 [2021-07-09 17:53:20,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:20,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:20,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:20,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:20,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:20,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:20,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879213917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:20,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:20,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 17:53:20,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116405368] [2021-07-09 17:53:20,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:20,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:20,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:20,841 INFO L87 Difference]: Start difference. First operand 2716 states and 11705 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:53:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:21,004 INFO L93 Difference]: Finished difference Result 2828 states and 12084 transitions. [2021-07-09 17:53:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 29 [2021-07-09 17:53:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:21,011 INFO L225 Difference]: With dead ends: 2828 [2021-07-09 17:53:21,012 INFO L226 Difference]: Without dead ends: 2813 [2021-07-09 17:53:21,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-07-09 17:53:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2713. [2021-07-09 17:53:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 4.312684365781711) internal successors, (11696), 2712 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 11696 transitions. [2021-07-09 17:53:21,055 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 11696 transitions. Word has length 29 [2021-07-09 17:53:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:21,055 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 11696 transitions. [2021-07-09 17:53:21,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-07-09 17:53:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 11696 transitions. [2021-07-09 17:53:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:21,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:21,060 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] [2021-07-09 17:53:21,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:21,261 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-07-09 17:53:21,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:21,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313771268] [2021-07-09 17:53:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:21,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:21,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313771268] [2021-07-09 17:53:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313771268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:21,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578806295] [2021-07-09 17:53:21,333 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 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 [2021-07-09 17:53:21,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:53:21,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:21,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:21,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:21,443 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 13 treesize of output 17 [2021-07-09 17:53:21,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:21,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:21,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:21,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:53:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:21,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578806295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:21,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:21,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:53:21,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938166299] [2021-07-09 17:53:21,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:21,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:21,560 INFO L87 Difference]: Start difference. First operand 2713 states and 11696 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:22,024 INFO L93 Difference]: Finished difference Result 3335 states and 14089 transitions. [2021-07-09 17:53:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:53:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:22,032 INFO L225 Difference]: With dead ends: 3335 [2021-07-09 17:53:22,032 INFO L226 Difference]: Without dead ends: 3316 [2021-07-09 17:53:22,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-07-09 17:53:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2828. [2021-07-09 17:53:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 4.305624336752741) internal successors, (12172), 2827 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 12172 transitions. [2021-07-09 17:53:22,079 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 12172 transitions. Word has length 29 [2021-07-09 17:53:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:22,079 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 12172 transitions. [2021-07-09 17:53:22,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 12172 transitions. [2021-07-09 17:53:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:22,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:22,083 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] [2021-07-09 17:53:22,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 17:53:22,284 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-07-09 17:53:22,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:22,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240727772] [2021-07-09 17:53:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:22,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:22,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240727772] [2021-07-09 17:53:22,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240727772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:22,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602456925] [2021-07-09 17:53:22,355 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 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 [2021-07-09 17:53:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:22,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:22,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:22,417 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 [2021-07-09 17:53:22,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:22,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:22,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:22,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:24 [2021-07-09 17:53:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602456925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:22,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:22,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-07-09 17:53:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993561120] [2021-07-09 17:53:22,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:53:22,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:53:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:22,501 INFO L87 Difference]: Start difference. First operand 2828 states and 12172 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-07-09 17:53:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:22,818 INFO L93 Difference]: Finished difference Result 3219 states and 13551 transitions. [2021-07-09 17:53:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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 29 [2021-07-09 17:53:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:22,826 INFO L225 Difference]: With dead ends: 3219 [2021-07-09 17:53:22,826 INFO L226 Difference]: Without dead ends: 3133 [2021-07-09 17:53:22,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2021-07-09 17:53:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2748. [2021-07-09 17:53:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 4.308336366945759) internal successors, (11835), 2747 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 11835 transitions. [2021-07-09 17:53:22,873 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 11835 transitions. Word has length 29 [2021-07-09 17:53:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:22,873 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 11835 transitions. [2021-07-09 17:53:22,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) 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) [2021-07-09 17:53:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 11835 transitions. [2021-07-09 17:53:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:22,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:22,878 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] [2021-07-09 17:53:23,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:53:23,079 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-07-09 17:53:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:23,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787247275] [2021-07-09 17:53:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:23,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787247275] [2021-07-09 17:53:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787247275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543273632] [2021-07-09 17:53:23,160 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 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 [2021-07-09 17:53:23,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:23,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:23,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:23,260 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 13 treesize of output 17 [2021-07-09 17:53:23,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:23,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:23,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:23,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:53:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:23,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543273632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:23,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:23,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:53:23,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781624474] [2021-07-09 17:53:23,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:23,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:23,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:23,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:23,377 INFO L87 Difference]: Start difference. First operand 2748 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:23,927 INFO L93 Difference]: Finished difference Result 2976 states and 12614 transitions. [2021-07-09 17:53:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:23,934 INFO L225 Difference]: With dead ends: 2976 [2021-07-09 17:53:23,934 INFO L226 Difference]: Without dead ends: 2961 [2021-07-09 17:53:23,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-07-09 17:53:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2724. [2021-07-09 17:53:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 4.3088505325009185) internal successors, (11733), 2723 states have internal predecessors, (11733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 11733 transitions. [2021-07-09 17:53:23,976 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 11733 transitions. Word has length 29 [2021-07-09 17:53:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:23,977 INFO L482 AbstractCegarLoop]: Abstraction has 2724 states and 11733 transitions. [2021-07-09 17:53:23,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 11733 transitions. [2021-07-09 17:53:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:23,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:23,981 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] [2021-07-09 17:53:24,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:24,181 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-07-09 17:53:24,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:24,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161679078] [2021-07-09 17:53:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:24,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161679078] [2021-07-09 17:53:24,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161679078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362267943] [2021-07-09 17:53:24,266 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 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 [2021-07-09 17:53:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:53:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:24,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:24,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:24,403 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 15 treesize of output 19 [2021-07-09 17:53:24,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:24,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:24,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:24,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-09 17:53:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362267943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:24,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:24,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:53:24,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317959532] [2021-07-09 17:53:24,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:24,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:24,485 INFO L87 Difference]: Start difference. First operand 2724 states and 11733 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:24,841 INFO L93 Difference]: Finished difference Result 2863 states and 12191 transitions. [2021-07-09 17:53:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:53:24,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:24,849 INFO L225 Difference]: With dead ends: 2863 [2021-07-09 17:53:24,849 INFO L226 Difference]: Without dead ends: 2848 [2021-07-09 17:53:24,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:53:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-07-09 17:53:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2732. [2021-07-09 17:53:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 4.304284145001831) internal successors, (11755), 2731 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 11755 transitions. [2021-07-09 17:53:24,892 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 11755 transitions. Word has length 29 [2021-07-09 17:53:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:24,892 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 11755 transitions. [2021-07-09 17:53:24,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 11755 transitions. [2021-07-09 17:53:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:24,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:24,896 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] [2021-07-09 17:53:25,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:53:25,097 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-07-09 17:53:25,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:25,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124940514] [2021-07-09 17:53:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:25,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:25,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124940514] [2021-07-09 17:53:25,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124940514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:25,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843946019] [2021-07-09 17:53:25,221 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 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 [2021-07-09 17:53:25,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:25,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:25,334 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 13 treesize of output 7 [2021-07-09 17:53:25,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:25,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:25,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:25,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-09 17:53:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843946019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:25,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:25,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 17:53:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367788252] [2021-07-09 17:53:25,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:25,386 INFO L87 Difference]: Start difference. First operand 2732 states and 11755 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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) [2021-07-09 17:53:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:25,660 INFO L93 Difference]: Finished difference Result 3429 states and 14478 transitions. [2021-07-09 17:53:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-07-09 17:53:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:25,668 INFO L225 Difference]: With dead ends: 3429 [2021-07-09 17:53:25,668 INFO L226 Difference]: Without dead ends: 3410 [2021-07-09 17:53:25,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-07-09 17:53:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2875. [2021-07-09 17:53:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2874 states have (on average 4.293667362560891) internal successors, (12340), 2874 states have internal predecessors, (12340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 12340 transitions. [2021-07-09 17:53:25,715 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 12340 transitions. Word has length 29 [2021-07-09 17:53:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:25,715 INFO L482 AbstractCegarLoop]: Abstraction has 2875 states and 12340 transitions. [2021-07-09 17:53:25,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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) [2021-07-09 17:53:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 12340 transitions. [2021-07-09 17:53:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:25,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:25,720 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] [2021-07-09 17:53:25,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:53:25,920 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-07-09 17:53:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426066369] [2021-07-09 17:53:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:26,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:26,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426066369] [2021-07-09 17:53:26,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426066369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:26,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833294013] [2021-07-09 17:53:26,045 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 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 [2021-07-09 17:53:26,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:53:26,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:26,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:26,148 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 13 treesize of output 17 [2021-07-09 17:53:26,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:26,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:26,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:26,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-07-09 17:53:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833294013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:26,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:26,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 17:53:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645233528] [2021-07-09 17:53:26,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:53:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:53:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:26,243 INFO L87 Difference]: Start difference. First operand 2875 states and 12340 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2021-07-09 17:53:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:26,930 INFO L93 Difference]: Finished difference Result 3488 states and 14640 transitions. [2021-07-09 17:53:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:53:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-07-09 17:53:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:26,939 INFO L225 Difference]: With dead ends: 3488 [2021-07-09 17:53:26,939 INFO L226 Difference]: Without dead ends: 3457 [2021-07-09 17:53:26,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 624.1ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:53:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-07-09 17:53:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2787. [2021-07-09 17:53:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 4.299353912419239) internal successors, (11978), 2786 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 11978 transitions. [2021-07-09 17:53:26,985 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 11978 transitions. Word has length 29 [2021-07-09 17:53:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:26,985 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 11978 transitions. [2021-07-09 17:53:26,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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) [2021-07-09 17:53:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 11978 transitions. [2021-07-09 17:53:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:26,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:26,989 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] [2021-07-09 17:53:27,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:53:27,190 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-07-09 17:53:27,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:27,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951577519] [2021-07-09 17:53:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:27,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951577519] [2021-07-09 17:53:27,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951577519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922478935] [2021-07-09 17:53:27,297 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 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 [2021-07-09 17:53:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:27,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:27,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:27,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:27,379 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 13 treesize of output 7 [2021-07-09 17:53:27,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:27,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:27,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:27,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-07-09 17:53:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:27,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922478935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:27,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:27,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:53:27,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690333384] [2021-07-09 17:53:27,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:27,445 INFO L87 Difference]: Start difference. First operand 2787 states and 11978 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) 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) [2021-07-09 17:53:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:27,701 INFO L93 Difference]: Finished difference Result 2978 states and 12650 transitions. [2021-07-09 17:53:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:53:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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 29 [2021-07-09 17:53:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:27,708 INFO L225 Difference]: With dead ends: 2978 [2021-07-09 17:53:27,708 INFO L226 Difference]: Without dead ends: 2963 [2021-07-09 17:53:27,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-07-09 17:53:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2775. [2021-07-09 17:53:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 4.30281182408075) internal successors, (11936), 2774 states have internal predecessors, (11936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 11936 transitions. [2021-07-09 17:53:27,749 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 11936 transitions. Word has length 29 [2021-07-09 17:53:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:27,750 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 11936 transitions. [2021-07-09 17:53:27,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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) [2021-07-09 17:53:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 11936 transitions. [2021-07-09 17:53:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:27,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:27,754 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] [2021-07-09 17:53:27,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:27,955 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:27,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-07-09 17:53:27,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:27,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430899005] [2021-07-09 17:53:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:28,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430899005] [2021-07-09 17:53:28,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430899005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339062831] [2021-07-09 17:53:28,045 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 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 [2021-07-09 17:53:28,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:28,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:28,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:28,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:28,181 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 15 treesize of output 19 [2021-07-09 17:53:28,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:28,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:28,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:28,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-07-09 17:53:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:28,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339062831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:28,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:28,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:53:28,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709406494] [2021-07-09 17:53:28,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:28,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:28,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:28,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:28,267 INFO L87 Difference]: Start difference. First operand 2775 states and 11936 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:28,649 INFO L93 Difference]: Finished difference Result 2919 states and 12429 transitions. [2021-07-09 17:53:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:53:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:28,657 INFO L225 Difference]: With dead ends: 2919 [2021-07-09 17:53:28,657 INFO L226 Difference]: Without dead ends: 2904 [2021-07-09 17:53:28,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:53:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-07-09 17:53:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2765. [2021-07-09 17:53:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 4.306801736613603) internal successors, (11904), 2764 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11904 transitions. [2021-07-09 17:53:28,699 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11904 transitions. Word has length 29 [2021-07-09 17:53:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:28,699 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11904 transitions. [2021-07-09 17:53:28,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11904 transitions. [2021-07-09 17:53:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:28,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:28,704 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] [2021-07-09 17:53:28,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 17:53:28,906 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:28,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-07-09 17:53:28,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:28,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164674233] [2021-07-09 17:53:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:29,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:29,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164674233] [2021-07-09 17:53:29,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164674233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:29,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054891232] [2021-07-09 17:53:29,048 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 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 [2021-07-09 17:53:29,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:53:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:29,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:29,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:29,129 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 [2021-07-09 17:53:29,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:29,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:29,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:29,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:29,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054891232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:29,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:29,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:53:29,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746107702] [2021-07-09 17:53:29,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:29,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:29,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:29,257 INFO L87 Difference]: Start difference. First operand 2765 states and 11904 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:30,380 INFO L93 Difference]: Finished difference Result 3739 states and 15661 transitions. [2021-07-09 17:53:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:53:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:30,390 INFO L225 Difference]: With dead ends: 3739 [2021-07-09 17:53:30,390 INFO L226 Difference]: Without dead ends: 3720 [2021-07-09 17:53:30,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-07-09 17:53:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 2904. [2021-07-09 17:53:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.300378918360317) internal successors, (12484), 2903 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12484 transitions. [2021-07-09 17:53:30,440 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12484 transitions. Word has length 29 [2021-07-09 17:53:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:30,441 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12484 transitions. [2021-07-09 17:53:30,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12484 transitions. [2021-07-09 17:53:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:30,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:30,445 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] [2021-07-09 17:53:30,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 17:53:30,661 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-07-09 17:53:30,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:30,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999719062] [2021-07-09 17:53:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:30,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:30,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999719062] [2021-07-09 17:53:30,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999719062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:30,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412276739] [2021-07-09 17:53:30,802 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 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 [2021-07-09 17:53:30,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:30,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:30,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:30,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:30,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:30,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:30,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412276739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:30,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:30,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 17:53:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888005259] [2021-07-09 17:53:30,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:30,953 INFO L87 Difference]: Start difference. First operand 2904 states and 12484 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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) [2021-07-09 17:53:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:31,178 INFO L93 Difference]: Finished difference Result 3374 states and 14254 transitions. [2021-07-09 17:53:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-07-09 17:53:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:31,187 INFO L225 Difference]: With dead ends: 3374 [2021-07-09 17:53:31,187 INFO L226 Difference]: Without dead ends: 3343 [2021-07-09 17:53:31,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-07-09 17:53:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2804. [2021-07-09 17:53:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.30467356403853) internal successors, (12066), 2803 states have internal predecessors, (12066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12066 transitions. [2021-07-09 17:53:31,236 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12066 transitions. Word has length 29 [2021-07-09 17:53:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:31,236 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12066 transitions. [2021-07-09 17:53:31,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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) [2021-07-09 17:53:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12066 transitions. [2021-07-09 17:53:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:31,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:31,241 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] [2021-07-09 17:53:31,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 17:53:31,442 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-07-09 17:53:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:31,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610182079] [2021-07-09 17:53:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:31,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:31,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610182079] [2021-07-09 17:53:31,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610182079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:31,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141953633] [2021-07-09 17:53:31,564 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 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 [2021-07-09 17:53:31,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:31,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:31,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:31,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:31,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:31,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:31,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141953633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:31,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:31,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:53:31,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251041674] [2021-07-09 17:53:31,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:31,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:31,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:31,709 INFO L87 Difference]: Start difference. First operand 2804 states and 12066 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) 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) [2021-07-09 17:53:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:31,947 INFO L93 Difference]: Finished difference Result 2926 states and 12487 transitions. [2021-07-09 17:53:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:53:31,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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 29 [2021-07-09 17:53:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:31,954 INFO L225 Difference]: With dead ends: 2926 [2021-07-09 17:53:31,954 INFO L226 Difference]: Without dead ends: 2911 [2021-07-09 17:53:31,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:53:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-09 17:53:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2774. [2021-07-09 17:53:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 4.30580598629643) internal successors, (11940), 2773 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 11940 transitions. [2021-07-09 17:53:31,995 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 11940 transitions. Word has length 29 [2021-07-09 17:53:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:31,995 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 11940 transitions. [2021-07-09 17:53:31,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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) [2021-07-09 17:53:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 11940 transitions. [2021-07-09 17:53:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:31,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:32,000 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] [2021-07-09 17:53:32,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:32,200 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:32,200 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-07-09 17:53:32,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011874560] [2021-07-09 17:53:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:32,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011874560] [2021-07-09 17:53:32,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011874560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017276719] [2021-07-09 17:53:32,340 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 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 [2021-07-09 17:53:32,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:53:32,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:32,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:32,421 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 [2021-07-09 17:53:32,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:32,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:32,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:32,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-07-09 17:53:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:32,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017276719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:32,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:32,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:53:32,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112076820] [2021-07-09 17:53:32,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:53:32,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:53:32,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:53:32,545 INFO L87 Difference]: Start difference. First operand 2774 states and 11940 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:33,473 INFO L93 Difference]: Finished difference Result 3811 states and 15865 transitions. [2021-07-09 17:53:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:53:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:53:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:33,483 INFO L225 Difference]: With dead ends: 3811 [2021-07-09 17:53:33,483 INFO L226 Difference]: Without dead ends: 3792 [2021-07-09 17:53:33,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 772.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:53:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-07-09 17:53:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2904. [2021-07-09 17:53:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.299345504650362) internal successors, (12481), 2903 states have internal predecessors, (12481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12481 transitions. [2021-07-09 17:53:33,536 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12481 transitions. Word has length 29 [2021-07-09 17:53:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:33,536 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12481 transitions. [2021-07-09 17:53:33,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12481 transitions. [2021-07-09 17:53:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:33,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:33,541 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] [2021-07-09 17:53:33,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:33,741 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-07-09 17:53:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:33,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276960992] [2021-07-09 17:53:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:33,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:33,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276960992] [2021-07-09 17:53:33,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276960992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:33,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133562795] [2021-07-09 17:53:33,887 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 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 [2021-07-09 17:53:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:53:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:53:33,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:33,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:33,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:33,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-07-09 17:53:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:34,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133562795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:34,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:34,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 17:53:34,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817520582] [2021-07-09 17:53:34,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:53:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:53:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:34,019 INFO L87 Difference]: Start difference. First operand 2904 states and 12481 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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) [2021-07-09 17:53:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:34,249 INFO L93 Difference]: Finished difference Result 3369 states and 14236 transitions. [2021-07-09 17:53:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-07-09 17:53:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:34,258 INFO L225 Difference]: With dead ends: 3369 [2021-07-09 17:53:34,258 INFO L226 Difference]: Without dead ends: 3338 [2021-07-09 17:53:34,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:53:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-07-09 17:53:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2804. [2021-07-09 17:53:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.3036032821976455) internal successors, (12063), 2803 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12063 transitions. [2021-07-09 17:53:34,304 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12063 transitions. Word has length 29 [2021-07-09 17:53:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:34,304 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12063 transitions. [2021-07-09 17:53:34,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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) [2021-07-09 17:53:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12063 transitions. [2021-07-09 17:53:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:53:34,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:34,309 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] [2021-07-09 17:53:34,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:34,509 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 310926972, now seen corresponding path program 20 times [2021-07-09 17:53:34,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:34,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784377551] [2021-07-09 17:53:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:34,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784377551] [2021-07-09 17:53:34,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784377551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392691128] [2021-07-09 17:53:34,635 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 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 [2021-07-09 17:53:34,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:34,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:53:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:34,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:53:34,691 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 [2021-07-09 17:53:34,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:34,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:34,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:34,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-07-09 17:53:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:34,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392691128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:34,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:34,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:53:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340866938] [2021-07-09 17:53:34,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:53:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:53:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:53:34,795 INFO L87 Difference]: Start difference. First operand 2804 states and 12063 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2021-07-09 17:53:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:35,083 INFO L93 Difference]: Finished difference Result 2918 states and 12429 transitions. [2021-07-09 17:53:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:53:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 29 [2021-07-09 17:53:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:35,090 INFO L225 Difference]: With dead ends: 2918 [2021-07-09 17:53:35,090 INFO L226 Difference]: Without dead ends: 2899 [2021-07-09 17:53:35,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:53:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-07-09 17:53:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2780. [2021-07-09 17:53:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 4.305145735876215) internal successors, (11964), 2779 states have internal predecessors, (11964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 11964 transitions. [2021-07-09 17:53:35,132 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 11964 transitions. Word has length 29 [2021-07-09 17:53:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:35,132 INFO L482 AbstractCegarLoop]: Abstraction has 2780 states and 11964 transitions. [2021-07-09 17:53:35,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2021-07-09 17:53:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 11964 transitions. [2021-07-09 17:53:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:35,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:35,137 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, 1] [2021-07-09 17:53:35,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 17:53:35,337 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1155389859, now seen corresponding path program 36 times [2021-07-09 17:53:35,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:35,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998802203] [2021-07-09 17:53:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:35,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998802203] [2021-07-09 17:53:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998802203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868374207] [2021-07-09 17:53:35,355 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 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 [2021-07-09 17:53:35,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:35,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:53:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:35,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868374207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:35,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:35,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-09 17:53:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175056067] [2021-07-09 17:53:35,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:53:35,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:53:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:53:35,443 INFO L87 Difference]: Start difference. First operand 2780 states and 11964 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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) [2021-07-09 17:53:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:35,521 INFO L93 Difference]: Finished difference Result 4234 states and 17658 transitions. [2021-07-09 17:53:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:53:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 31 [2021-07-09 17:53:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:35,532 INFO L225 Difference]: With dead ends: 4234 [2021-07-09 17:53:35,532 INFO L226 Difference]: Without dead ends: 4155 [2021-07-09 17:53:35,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-07-09 17:53:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3739. [2021-07-09 17:53:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.313001605136437) internal successors, (16122), 3738 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 16122 transitions. [2021-07-09 17:53:35,597 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 16122 transitions. Word has length 31 [2021-07-09 17:53:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 16122 transitions. [2021-07-09 17:53:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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) [2021-07-09 17:53:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 16122 transitions. [2021-07-09 17:53:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:35,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:35,604 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, 1] [2021-07-09 17:53:35,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:53:35,805 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2104598493, now seen corresponding path program 37 times [2021-07-09 17:53:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:35,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215280040] [2021-07-09 17:53:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:35,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:35,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215280040] [2021-07-09 17:53:35,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215280040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:35,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74374325] [2021-07-09 17:53:35,824 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 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 [2021-07-09 17:53:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:35,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74374325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:35,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:35,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:53:35,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841464103] [2021-07-09 17:53:35,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:53:35,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:53:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:53:35,912 INFO L87 Difference]: Start difference. First operand 3739 states and 16122 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-07-09 17:53:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:35,982 INFO L93 Difference]: Finished difference Result 4841 states and 20069 transitions. [2021-07-09 17:53:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:53:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 31 [2021-07-09 17:53:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:35,994 INFO L225 Difference]: With dead ends: 4841 [2021-07-09 17:53:35,994 INFO L226 Difference]: Without dead ends: 4724 [2021-07-09 17:53:35,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:53:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2021-07-09 17:53:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3848. [2021-07-09 17:53:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.288536521965168) internal successors, (16498), 3847 states have internal predecessors, (16498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16498 transitions. [2021-07-09 17:53:36,064 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16498 transitions. Word has length 31 [2021-07-09 17:53:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:36,064 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16498 transitions. [2021-07-09 17:53:36,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-07-09 17:53:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16498 transitions. [2021-07-09 17:53:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:36,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:36,071 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, 1] [2021-07-09 17:53:36,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 17:53:36,271 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -663936225, now seen corresponding path program 38 times [2021-07-09 17:53:36,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:36,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010153438] [2021-07-09 17:53:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:36,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:36,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010153438] [2021-07-09 17:53:36,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010153438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:36,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602393607] [2021-07-09 17:53:36,292 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 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 [2021-07-09 17:53:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602393607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:36,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:36,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 17:53:36,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848018972] [2021-07-09 17:53:36,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:53:36,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:53:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:53:36,383 INFO L87 Difference]: Start difference. First operand 3848 states and 16498 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:36,571 INFO L93 Difference]: Finished difference Result 6042 states and 24692 transitions. [2021-07-09 17:53:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:53:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:53:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:36,587 INFO L225 Difference]: With dead ends: 6042 [2021-07-09 17:53:36,587 INFO L226 Difference]: Without dead ends: 5723 [2021-07-09 17:53:36,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:53:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-07-09 17:53:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4408. [2021-07-09 17:53:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 4.309507601542999) internal successors, (18992), 4407 states have internal predecessors, (18992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 18992 transitions. [2021-07-09 17:53:36,679 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 18992 transitions. Word has length 31 [2021-07-09 17:53:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:36,679 INFO L482 AbstractCegarLoop]: Abstraction has 4408 states and 18992 transitions. [2021-07-09 17:53:36,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 18992 transitions. [2021-07-09 17:53:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:36,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:36,687 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, 1] [2021-07-09 17:53:36,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 17:53:36,888 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash -750260253, now seen corresponding path program 39 times [2021-07-09 17:53:36,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:36,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035549163] [2021-07-09 17:53:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:36,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:36,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035549163] [2021-07-09 17:53:36,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035549163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:36,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771175783] [2021-07-09 17:53:36,909 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 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 [2021-07-09 17:53:36,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:53:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771175783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-07-09 17:53:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318492647] [2021-07-09 17:53:36,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:53:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:53:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:53:36,985 INFO L87 Difference]: Start difference. First operand 4408 states and 18992 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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) [2021-07-09 17:53:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:37,065 INFO L93 Difference]: Finished difference Result 5262 states and 22054 transitions. [2021-07-09 17:53:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:53:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 31 [2021-07-09 17:53:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:37,079 INFO L225 Difference]: With dead ends: 5262 [2021-07-09 17:53:37,079 INFO L226 Difference]: Without dead ends: 5190 [2021-07-09 17:53:37,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:53:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-07-09 17:53:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4400. [2021-07-09 17:53:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 4399 states have (on average 4.2798363264378265) internal successors, (18827), 4399 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 18827 transitions. [2021-07-09 17:53:37,160 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 18827 transitions. Word has length 31 [2021-07-09 17:53:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:37,160 INFO L482 AbstractCegarLoop]: Abstraction has 4400 states and 18827 transitions. [2021-07-09 17:53:37,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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) [2021-07-09 17:53:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 18827 transitions. [2021-07-09 17:53:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:37,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:37,167 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, 1] [2021-07-09 17:53:37,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-09 17:53:37,368 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:37,368 INFO L82 PathProgramCache]: Analyzing trace with hash 75547345, now seen corresponding path program 40 times [2021-07-09 17:53:37,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:37,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651606179] [2021-07-09 17:53:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:37,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:37,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651606179] [2021-07-09 17:53:37,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651606179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:37,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732755013] [2021-07-09 17:53:37,388 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 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 [2021-07-09 17:53:37,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:37,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:37,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732755013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:37,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:37,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-07-09 17:53:37,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915186986] [2021-07-09 17:53:37,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:53:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:53:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:53:37,471 INFO L87 Difference]: Start difference. First operand 4400 states and 18827 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:37,566 INFO L93 Difference]: Finished difference Result 7147 states and 29601 transitions. [2021-07-09 17:53:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:53:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:53:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:37,584 INFO L225 Difference]: With dead ends: 7147 [2021-07-09 17:53:37,584 INFO L226 Difference]: Without dead ends: 6921 [2021-07-09 17:53:37,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:53:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6921 states. [2021-07-09 17:53:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 5792. [2021-07-09 17:53:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.318425142462441) internal successors, (25008), 5791 states have internal predecessors, (25008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25008 transitions. [2021-07-09 17:53:37,725 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25008 transitions. Word has length 31 [2021-07-09 17:53:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:37,726 INFO L482 AbstractCegarLoop]: Abstraction has 5792 states and 25008 transitions. [2021-07-09 17:53:37,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25008 transitions. [2021-07-09 17:53:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:37,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:37,737 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, 1] [2021-07-09 17:53:37,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:37,952 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash -205490181, now seen corresponding path program 41 times [2021-07-09 17:53:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:37,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689887287] [2021-07-09 17:53:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:37,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:37,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689887287] [2021-07-09 17:53:37,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689887287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:37,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837696925] [2021-07-09 17:53:37,971 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 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 [2021-07-09 17:53:38,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:53:38,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837696925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:38,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:38,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-07-09 17:53:38,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625729983] [2021-07-09 17:53:38,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:53:38,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:38,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:53:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:53:38,059 INFO L87 Difference]: Start difference. First operand 5792 states and 25008 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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) [2021-07-09 17:53:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:38,147 INFO L93 Difference]: Finished difference Result 7511 states and 31291 transitions. [2021-07-09 17:53:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:53:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 31 [2021-07-09 17:53:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:38,169 INFO L225 Difference]: With dead ends: 7511 [2021-07-09 17:53:38,170 INFO L226 Difference]: Without dead ends: 7409 [2021-07-09 17:53:38,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:53:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-07-09 17:53:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 5656. [2021-07-09 17:53:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.315296198054819) internal successors, (24403), 5655 states have internal predecessors, (24403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24403 transitions. [2021-07-09 17:53:38,294 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24403 transitions. Word has length 31 [2021-07-09 17:53:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:38,294 INFO L482 AbstractCegarLoop]: Abstraction has 5656 states and 24403 transitions. [2021-07-09 17:53:38,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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) [2021-07-09 17:53:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24403 transitions. [2021-07-09 17:53:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:38,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:38,305 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, 1] [2021-07-09 17:53:38,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 17:53:38,505 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 42 times [2021-07-09 17:53:38,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:38,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059090222] [2021-07-09 17:53:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:38,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:38,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059090222] [2021-07-09 17:53:38,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059090222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:38,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904307487] [2021-07-09 17:53:38,523 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 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 [2021-07-09 17:53:38,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:38,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:38,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904307487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:38,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:38,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:53:38,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139035823] [2021-07-09 17:53:38,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:53:38,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:53:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:53:38,598 INFO L87 Difference]: Start difference. First operand 5656 states and 24403 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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) [2021-07-09 17:53:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:38,687 INFO L93 Difference]: Finished difference Result 7291 states and 30390 transitions. [2021-07-09 17:53:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:53:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 31 [2021-07-09 17:53:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:38,705 INFO L225 Difference]: With dead ends: 7291 [2021-07-09 17:53:38,705 INFO L226 Difference]: Without dead ends: 7213 [2021-07-09 17:53:38,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:53:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-07-09 17:53:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6069. [2021-07-09 17:53:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 4.318226763348714) internal successors, (26203), 6068 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 26203 transitions. [2021-07-09 17:53:38,857 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 26203 transitions. Word has length 31 [2021-07-09 17:53:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:38,857 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 26203 transitions. [2021-07-09 17:53:38,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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) [2021-07-09 17:53:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 26203 transitions. [2021-07-09 17:53:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:53:38,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:38,868 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, 1] [2021-07-09 17:53:39,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:39,069 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash 562379733, now seen corresponding path program 43 times [2021-07-09 17:53:39,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:39,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874950270] [2021-07-09 17:53:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:39,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874950270] [2021-07-09 17:53:39,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874950270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:39,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509563150] [2021-07-09 17:53:39,085 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 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 [2021-07-09 17:53:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:39,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:53:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:39,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509563150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:39,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:39,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 17:53:39,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105296527] [2021-07-09 17:53:39,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:53:39,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:53:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:53:39,173 INFO L87 Difference]: Start difference. First operand 6069 states and 26203 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:39,280 INFO L93 Difference]: Finished difference Result 8199 states and 34127 transitions. [2021-07-09 17:53:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:53:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:53:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:39,301 INFO L225 Difference]: With dead ends: 8199 [2021-07-09 17:53:39,301 INFO L226 Difference]: Without dead ends: 7998 [2021-07-09 17:53:39,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:53:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-07-09 17:53:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 5836. [2021-07-09 17:53:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 5835 states have (on average 4.310025706940874) internal successors, (25149), 5835 states have internal predecessors, (25149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-07-09 17:53:39,441 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-07-09 17:53:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:39,441 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-07-09 17:53:39,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-07-09 17:53:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:39,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:39,452 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, 1, 1, 1] [2021-07-09 17:53:39,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:39,653 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1890243778, now seen corresponding path program 44 times [2021-07-09 17:53:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039291310] [2021-07-09 17:53:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:39,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:39,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039291310] [2021-07-09 17:53:39,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039291310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:39,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993215726] [2021-07-09 17:53:39,826 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 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 [2021-07-09 17:53:39,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:39,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:39,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:40,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:53:40,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:40,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:40,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:40,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-09 17:53:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:40,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993215726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:40,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:40,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:53:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379308532] [2021-07-09 17:53:40,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:40,279 INFO L87 Difference]: Start difference. First operand 5836 states and 25149 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:41,381 INFO L93 Difference]: Finished difference Result 6478 states and 27684 transitions. [2021-07-09 17:53:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:53:41,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:41,399 INFO L225 Difference]: With dead ends: 6478 [2021-07-09 17:53:41,400 INFO L226 Difference]: Without dead ends: 6459 [2021-07-09 17:53:41,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 969.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:53:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-07-09 17:53:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-07-09 17:53:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 4.303974402155608) internal successors, (25557), 5938 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-07-09 17:53:41,568 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-07-09 17:53:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:41,568 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-07-09 17:53:41,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-07-09 17:53:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:41,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:41,581 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, 1, 1, 1] [2021-07-09 17:53:41,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-07-09 17:53:41,781 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash 185907592, now seen corresponding path program 45 times [2021-07-09 17:53:41,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:41,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600390138] [2021-07-09 17:53:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600390138] [2021-07-09 17:53:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600390138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527729748] [2021-07-09 17:53:41,974 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 [2021-07-09 17:53:42,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:42,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:42,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:42,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:53:42,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:42,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:42,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:42,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-09 17:53:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:42,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527729748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:42,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:42,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:53:42,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542220700] [2021-07-09 17:53:42,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:42,455 INFO L87 Difference]: Start difference. First operand 5939 states and 25557 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:43,637 INFO L93 Difference]: Finished difference Result 6497 states and 27746 transitions. [2021-07-09 17:53:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:43,656 INFO L225 Difference]: With dead ends: 6497 [2021-07-09 17:53:43,657 INFO L226 Difference]: Without dead ends: 6478 [2021-07-09 17:53:43,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1115.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-07-09 17:53:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-07-09 17:53:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 4.303484261908769) internal successors, (25567), 5941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-07-09 17:53:43,794 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-07-09 17:53:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:43,794 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-07-09 17:53:43,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-07-09 17:53:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:43,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:43,805 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, 1, 1, 1] [2021-07-09 17:53:44,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 17:53:44,006 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash -265337576, now seen corresponding path program 46 times [2021-07-09 17:53:44,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:44,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617299949] [2021-07-09 17:53:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:44,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617299949] [2021-07-09 17:53:44,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617299949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390276323] [2021-07-09 17:53:44,168 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 [2021-07-09 17:53:44,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:44,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:44,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 17:53:44,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:44,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:44,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:44,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:53:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:44,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390276323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:44,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:44,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:53:44,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068273381] [2021-07-09 17:53:44,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:44,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:44,460 INFO L87 Difference]: Start difference. First operand 5942 states and 25567 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:45,742 INFO L93 Difference]: Finished difference Result 6457 states and 27475 transitions. [2021-07-09 17:53:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:53:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:45,803 INFO L225 Difference]: With dead ends: 6457 [2021-07-09 17:53:45,803 INFO L226 Difference]: Without dead ends: 6438 [2021-07-09 17:53:45,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-07-09 17:53:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-07-09 17:53:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 4.307062948739356) internal successors, (25795), 5989 states have internal predecessors, (25795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-07-09 17:53:45,907 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-07-09 17:53:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:45,907 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-07-09 17:53:45,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-07-09 17:53:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:45,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:45,918 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, 1, 1, 1] [2021-07-09 17:53:46,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:53:46,119 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1848381270, now seen corresponding path program 47 times [2021-07-09 17:53:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:46,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414961879] [2021-07-09 17:53:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:46,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414961879] [2021-07-09 17:53:46,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414961879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892062611] [2021-07-09 17:53:46,286 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 [2021-07-09 17:53:46,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:53:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:46,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:46,498 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 28 treesize of output 12 [2021-07-09 17:53:46,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:46,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:46,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:46,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:53:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:46,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892062611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:46,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:46,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:53:46,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785549002] [2021-07-09 17:53:46,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:46,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:46,592 INFO L87 Difference]: Start difference. First operand 5990 states and 25795 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:48,125 INFO L93 Difference]: Finished difference Result 6603 states and 28103 transitions. [2021-07-09 17:53:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:53:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:48,144 INFO L225 Difference]: With dead ends: 6603 [2021-07-09 17:53:48,144 INFO L226 Difference]: Without dead ends: 6584 [2021-07-09 17:53:48,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1083.7ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:53:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-07-09 17:53:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-07-09 17:53:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.308165641110926) internal successors, (25905), 6013 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-07-09 17:53:48,253 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-07-09 17:53:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:48,253 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-07-09 17:53:48,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-07-09 17:53:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:48,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:48,264 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, 1, 1, 1] [2021-07-09 17:53:48,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:53:48,465 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1882988602, now seen corresponding path program 48 times [2021-07-09 17:53:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:48,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437766045] [2021-07-09 17:53:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:48,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437766045] [2021-07-09 17:53:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437766045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783329757] [2021-07-09 17:53:48,629 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 [2021-07-09 17:53:48,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:53:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:48,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:48,898 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:53:48,898 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 27 treesize of output 55 [2021-07-09 17:53:48,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:53:48,934 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-07-09 17:53:48,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:48,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:53:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:49,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783329757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:49,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:49,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:53:49,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061794015] [2021-07-09 17:53:49,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:53:49,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:49,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:53:49,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:53:49,052 INFO L87 Difference]: Start difference. First operand 6014 states and 25905 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:50,551 INFO L93 Difference]: Finished difference Result 6445 states and 27477 transitions. [2021-07-09 17:53:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:53:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:50,569 INFO L225 Difference]: With dead ends: 6445 [2021-07-09 17:53:50,569 INFO L226 Difference]: Without dead ends: 6426 [2021-07-09 17:53:50,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1309.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:53:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-07-09 17:53:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6024. [2021-07-09 17:53:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 4.307155902374232) internal successors, (25942), 6023 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 25942 transitions. [2021-07-09 17:53:50,671 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 25942 transitions. Word has length 33 [2021-07-09 17:53:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:50,671 INFO L482 AbstractCegarLoop]: Abstraction has 6024 states and 25942 transitions. [2021-07-09 17:53:50,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 25942 transitions. [2021-07-09 17:53:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:50,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:50,682 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, 1, 1, 1] [2021-07-09 17:53:50,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:50,882 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:50,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1511763596, now seen corresponding path program 49 times [2021-07-09 17:53:50,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:50,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138982810] [2021-07-09 17:53:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:51,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:51,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138982810] [2021-07-09 17:53:51,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138982810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:51,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740227236] [2021-07-09 17:53:51,043 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 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 [2021-07-09 17:53:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:51,234 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 [2021-07-09 17:53:51,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:51,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:51,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:51,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:53:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740227236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:51,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:51,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:53:51,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745914565] [2021-07-09 17:53:51,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:53:51,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:53:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:53:51,320 INFO L87 Difference]: Start difference. First operand 6024 states and 25942 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:52,320 INFO L93 Difference]: Finished difference Result 6948 states and 29535 transitions. [2021-07-09 17:53:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:53:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:52,339 INFO L225 Difference]: With dead ends: 6948 [2021-07-09 17:53:52,339 INFO L226 Difference]: Without dead ends: 6933 [2021-07-09 17:53:52,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 711.1ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:53:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2021-07-09 17:53:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6087. [2021-07-09 17:53:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6087 states, 6086 states have (on average 4.306112389089714) internal successors, (26207), 6086 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 26207 transitions. [2021-07-09 17:53:52,461 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 26207 transitions. Word has length 33 [2021-07-09 17:53:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:52,462 INFO L482 AbstractCegarLoop]: Abstraction has 6087 states and 26207 transitions. [2021-07-09 17:53:52,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 26207 transitions. [2021-07-09 17:53:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:52,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:52,473 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, 1, 1, 1] [2021-07-09 17:53:52,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:52,674 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -156629846, now seen corresponding path program 50 times [2021-07-09 17:53:52,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:52,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128985387] [2021-07-09 17:53:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:52,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128985387] [2021-07-09 17:53:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128985387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532200121] [2021-07-09 17:53:52,845 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 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 [2021-07-09 17:53:52,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:53,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:53,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:53:53,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:53,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:53,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:53,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 17:53:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:53,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532200121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:53,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:53,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:53:53,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95388024] [2021-07-09 17:53:53,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:53,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:53,210 INFO L87 Difference]: Start difference. First operand 6087 states and 26207 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:54,185 INFO L93 Difference]: Finished difference Result 6483 states and 27696 transitions. [2021-07-09 17:53:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:53:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:54,204 INFO L225 Difference]: With dead ends: 6483 [2021-07-09 17:53:54,204 INFO L226 Difference]: Without dead ends: 6469 [2021-07-09 17:53:54,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:53:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-07-09 17:53:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6073. [2021-07-09 17:53:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-07-09 17:53:54,314 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-07-09 17:53:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:54,314 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-07-09 17:53:54,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-07-09 17:53:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:54,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:54,325 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, 1, 1, 1] [2021-07-09 17:53:54,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:54,538 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1226663166, now seen corresponding path program 51 times [2021-07-09 17:53:54,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:54,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775938255] [2021-07-09 17:53:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:54,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:54,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775938255] [2021-07-09 17:53:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775938255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432727624] [2021-07-09 17:53:54,710 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 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 [2021-07-09 17:53:54,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:53:54,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:54,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:54,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:53:54,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:55,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:55,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:55,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-09 17:53:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:55,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432727624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:55,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:55,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:53:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302860131] [2021-07-09 17:53:55,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:53:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:53:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:53:55,122 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:56,426 INFO L93 Difference]: Finished difference Result 6646 states and 28417 transitions. [2021-07-09 17:53:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:56,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:56,445 INFO L225 Difference]: With dead ends: 6646 [2021-07-09 17:53:56,445 INFO L226 Difference]: Without dead ends: 6627 [2021-07-09 17:53:56,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2021-07-09 17:53:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6073. [2021-07-09 17:53:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-07-09 17:53:56,551 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-07-09 17:53:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:56,551 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-07-09 17:53:56,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-07-09 17:53:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:56,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:56,562 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, 1, 1, 1] [2021-07-09 17:53:56,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:53:56,765 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1371223120, now seen corresponding path program 52 times [2021-07-09 17:53:56,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:56,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038765690] [2021-07-09 17:53:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:56,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:56,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038765690] [2021-07-09 17:53:56,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038765690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:56,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806202027] [2021-07-09 17:53:56,941 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 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 [2021-07-09 17:53:56,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:56,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:57,156 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 [2021-07-09 17:53:57,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:57,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:57,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:57,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:53:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:57,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806202027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:57,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:57,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:53:57,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463528099] [2021-07-09 17:53:57,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:57,237 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:58,507 INFO L93 Difference]: Finished difference Result 7065 states and 30042 transitions. [2021-07-09 17:53:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:53:58,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:53:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:58,527 INFO L225 Difference]: With dead ends: 7065 [2021-07-09 17:53:58,527 INFO L226 Difference]: Without dead ends: 7030 [2021-07-09 17:53:58,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 939.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:53:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2021-07-09 17:53:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6011. [2021-07-09 17:53:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.31297836938436) internal successors, (25921), 6010 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-07-09 17:53:58,638 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-07-09 17:53:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:58,638 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-07-09 17:53:58,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-07-09 17:53:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:53:58,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:58,649 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, 1, 1, 1] [2021-07-09 17:53:58,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 17:53:58,849 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:58,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1124446190, now seen corresponding path program 53 times [2021-07-09 17:53:58,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:58,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980968388] [2021-07-09 17:53:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980968388] [2021-07-09 17:53:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980968388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099685890] [2021-07-09 17:53:59,014 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 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 [2021-07-09 17:53:59,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:53:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:53:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:59,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:53:59,175 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 29 treesize of output 13 [2021-07-09 17:53:59,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:53:59,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:53:59,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:53:59,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:53:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:59,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099685890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:59,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:59,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:53:59,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173153795] [2021-07-09 17:53:59,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:59,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:59,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:59,272 INFO L87 Difference]: Start difference. First operand 6011 states and 25921 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:00,557 INFO L93 Difference]: Finished difference Result 7566 states and 32115 transitions. [2021-07-09 17:54:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:54:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:00,617 INFO L225 Difference]: With dead ends: 7566 [2021-07-09 17:54:00,617 INFO L226 Difference]: Without dead ends: 7516 [2021-07-09 17:54:00,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1051.6ms TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:54:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-07-09 17:54:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6306. [2021-07-09 17:54:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 4.32244250594766) internal successors, (27253), 6305 states have internal predecessors, (27253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 27253 transitions. [2021-07-09 17:54:00,733 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 27253 transitions. Word has length 33 [2021-07-09 17:54:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:00,734 INFO L482 AbstractCegarLoop]: Abstraction has 6306 states and 27253 transitions. [2021-07-09 17:54:00,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 27253 transitions. [2021-07-09 17:54:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:00,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:00,745 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, 1, 1, 1] [2021-07-09 17:54:00,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:54:00,946 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:00,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1867248500, now seen corresponding path program 54 times [2021-07-09 17:54:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:00,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558666206] [2021-07-09 17:54:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:01,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558666206] [2021-07-09 17:54:01,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558666206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078813606] [2021-07-09 17:54:01,103 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 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 [2021-07-09 17:54:01,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:54:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:54:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:01,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:01,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:54:01,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:01,285 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-07-09 17:54:01,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:01,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:01,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:01,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-07-09 17:54:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:01,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078813606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:01,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:01,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:54:01,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420787780] [2021-07-09 17:54:01,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:54:01,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:54:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:01,459 INFO L87 Difference]: Start difference. First operand 6306 states and 27253 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:02,929 INFO L93 Difference]: Finished difference Result 7086 states and 30206 transitions. [2021-07-09 17:54:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:54:02,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:02,949 INFO L225 Difference]: With dead ends: 7086 [2021-07-09 17:54:02,949 INFO L226 Difference]: Without dead ends: 7073 [2021-07-09 17:54:02,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1163.5ms TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:54:02,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2021-07-09 17:54:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 6315. [2021-07-09 17:54:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 6314 states have (on average 4.31913208742477) internal successors, (27271), 6314 states have internal predecessors, (27271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 27271 transitions. [2021-07-09 17:54:03,065 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 27271 transitions. Word has length 33 [2021-07-09 17:54:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:03,066 INFO L482 AbstractCegarLoop]: Abstraction has 6315 states and 27271 transitions. [2021-07-09 17:54:03,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 27271 transitions. [2021-07-09 17:54:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:03,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:03,078 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, 1, 1, 1] [2021-07-09 17:54:03,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 17:54:03,278 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1528356724, now seen corresponding path program 55 times [2021-07-09 17:54:03,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:03,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630695835] [2021-07-09 17:54:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:03,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:03,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630695835] [2021-07-09 17:54:03,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630695835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:03,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231947906] [2021-07-09 17:54:03,494 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 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 [2021-07-09 17:54:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:03,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:03,668 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 29 treesize of output 13 [2021-07-09 17:54:03,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:03,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:03,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:03,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:54:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:03,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231947906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:03,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:03,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:54:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462383523] [2021-07-09 17:54:03,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:03,792 INFO L87 Difference]: Start difference. First operand 6315 states and 27271 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:06,140 INFO L93 Difference]: Finished difference Result 7847 states and 33031 transitions. [2021-07-09 17:54:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:54:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:06,162 INFO L225 Difference]: With dead ends: 7847 [2021-07-09 17:54:06,162 INFO L226 Difference]: Without dead ends: 7796 [2021-07-09 17:54:06,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1850.0ms TimeCoverageRelationStatistics Valid=463, Invalid=2959, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:54:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-07-09 17:54:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6274. [2021-07-09 17:54:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 6273 states have (on average 4.320102024549657) internal successors, (27100), 6273 states have internal predecessors, (27100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 27100 transitions. [2021-07-09 17:54:06,292 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 27100 transitions. Word has length 33 [2021-07-09 17:54:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:06,292 INFO L482 AbstractCegarLoop]: Abstraction has 6274 states and 27100 transitions. [2021-07-09 17:54:06,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 27100 transitions. [2021-07-09 17:54:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:06,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:06,304 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, 1, 1, 1] [2021-07-09 17:54:06,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:54:06,504 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:06,505 INFO L82 PathProgramCache]: Analyzing trace with hash 142194076, now seen corresponding path program 56 times [2021-07-09 17:54:06,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:06,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678993204] [2021-07-09 17:54:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:06,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:06,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678993204] [2021-07-09 17:54:06,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678993204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:06,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568662887] [2021-07-09 17:54:06,719 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 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 [2021-07-09 17:54:06,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:06,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:06,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:54:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:06,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:06,898 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 [2021-07-09 17:54:06,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:06,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:06,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:06,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 17:54:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568662887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:07,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:07,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:54:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057155554] [2021-07-09 17:54:07,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:07,093 INFO L87 Difference]: Start difference. First operand 6274 states and 27100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:09,839 INFO L93 Difference]: Finished difference Result 7830 states and 32405 transitions. [2021-07-09 17:54:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:54:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:09,861 INFO L225 Difference]: With dead ends: 7830 [2021-07-09 17:54:09,861 INFO L226 Difference]: Without dead ends: 7800 [2021-07-09 17:54:09,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2321.4ms TimeCoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:54:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-07-09 17:54:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6304. [2021-07-09 17:54:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 4.32206885610027) internal successors, (27242), 6303 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 27242 transitions. [2021-07-09 17:54:09,997 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 27242 transitions. Word has length 33 [2021-07-09 17:54:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:09,997 INFO L482 AbstractCegarLoop]: Abstraction has 6304 states and 27242 transitions. [2021-07-09 17:54:09,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 27242 transitions. [2021-07-09 17:54:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:10,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:10,009 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, 1, 1, 1] [2021-07-09 17:54:10,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:10,210 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:10,210 INFO L82 PathProgramCache]: Analyzing trace with hash -906578326, now seen corresponding path program 57 times [2021-07-09 17:54:10,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:10,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720592953] [2021-07-09 17:54:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:10,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:10,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720592953] [2021-07-09 17:54:10,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720592953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:10,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604780163] [2021-07-09 17:54:10,371 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 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 [2021-07-09 17:54:10,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:54:10,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:54:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:10,567 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:10,567 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 29 treesize of output 57 [2021-07-09 17:54:10,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:10,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:10,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:10,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 17:54:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:10,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604780163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:10,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:10,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:54:10,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366256619] [2021-07-09 17:54:10,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:54:10,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:10,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:54:10,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:10,798 INFO L87 Difference]: Start difference. First operand 6304 states and 27242 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:12,733 INFO L93 Difference]: Finished difference Result 7675 states and 32393 transitions. [2021-07-09 17:54:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:54:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:12,754 INFO L225 Difference]: With dead ends: 7675 [2021-07-09 17:54:12,755 INFO L226 Difference]: Without dead ends: 7613 [2021-07-09 17:54:12,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1703.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2790, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:54:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-07-09 17:54:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 6435. [2021-07-09 17:54:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 4.327012744793286) internal successors, (27840), 6434 states have internal predecessors, (27840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 27840 transitions. [2021-07-09 17:54:12,886 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 27840 transitions. Word has length 33 [2021-07-09 17:54:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:12,886 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 27840 transitions. [2021-07-09 17:54:12,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 27840 transitions. [2021-07-09 17:54:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:12,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:12,898 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, 1, 1, 1] [2021-07-09 17:54:13,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:13,099 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 396694280, now seen corresponding path program 58 times [2021-07-09 17:54:13,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:13,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796488144] [2021-07-09 17:54:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:13,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796488144] [2021-07-09 17:54:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796488144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658406126] [2021-07-09 17:54:13,277 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 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 [2021-07-09 17:54:13,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:13,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:13,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:13,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:13,433 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 [2021-07-09 17:54:13,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:13,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:13,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:13,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:54:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:13,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658406126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:13,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:13,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:54:13,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030571894] [2021-07-09 17:54:13,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:13,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:13,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:13,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:13,530 INFO L87 Difference]: Start difference. First operand 6435 states and 27840 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:14,535 INFO L93 Difference]: Finished difference Result 7805 states and 32976 transitions. [2021-07-09 17:54:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:54:14,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:14,557 INFO L225 Difference]: With dead ends: 7805 [2021-07-09 17:54:14,558 INFO L226 Difference]: Without dead ends: 7781 [2021-07-09 17:54:14,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:54:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-07-09 17:54:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 6489. [2021-07-09 17:54:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6489 states, 6488 states have (on average 4.331072749691739) internal successors, (28100), 6488 states have internal predecessors, (28100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6489 states to 6489 states and 28100 transitions. [2021-07-09 17:54:14,691 INFO L78 Accepts]: Start accepts. Automaton has 6489 states and 28100 transitions. Word has length 33 [2021-07-09 17:54:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 6489 states and 28100 transitions. [2021-07-09 17:54:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6489 states and 28100 transitions. [2021-07-09 17:54:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:14,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:14,703 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, 1, 1, 1] [2021-07-09 17:54:14,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 17:54:14,904 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1271699162, now seen corresponding path program 59 times [2021-07-09 17:54:14,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:14,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409129995] [2021-07-09 17:54:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:15,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409129995] [2021-07-09 17:54:15,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409129995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129079292] [2021-07-09 17:54:15,061 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 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 [2021-07-09 17:54:15,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:54:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:15,219 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 29 treesize of output 13 [2021-07-09 17:54:15,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:15,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:15,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:15,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:54:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:15,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129079292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:15,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:15,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182812806] [2021-07-09 17:54:15,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:15,331 INFO L87 Difference]: Start difference. First operand 6489 states and 28100 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:16,154 INFO L93 Difference]: Finished difference Result 7827 states and 33033 transitions. [2021-07-09 17:54:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:54:16,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:16,214 INFO L225 Difference]: With dead ends: 7827 [2021-07-09 17:54:16,215 INFO L226 Difference]: Without dead ends: 7771 [2021-07-09 17:54:16,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 745.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:54:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-07-09 17:54:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6483. [2021-07-09 17:54:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 4.333076211045974) internal successors, (28087), 6482 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 28087 transitions. [2021-07-09 17:54:16,340 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 28087 transitions. Word has length 33 [2021-07-09 17:54:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:16,340 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 28087 transitions. [2021-07-09 17:54:16,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 28087 transitions. [2021-07-09 17:54:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:16,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:16,353 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, 1, 1, 1] [2021-07-09 17:54:16,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:54:16,553 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:16,554 INFO L82 PathProgramCache]: Analyzing trace with hash -387346006, now seen corresponding path program 60 times [2021-07-09 17:54:16,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:16,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078578280] [2021-07-09 17:54:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:16,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078578280] [2021-07-09 17:54:16,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078578280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878970541] [2021-07-09 17:54:16,728 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 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 [2021-07-09 17:54:16,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:54:16,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:54:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:16,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:16,888 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 [2021-07-09 17:54:16,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:16,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:16,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:16,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:54:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:17,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878970541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:17,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:17,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:54:17,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531668889] [2021-07-09 17:54:17,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:17,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:17,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:17,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:17,058 INFO L87 Difference]: Start difference. First operand 6483 states and 28087 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:18,446 INFO L93 Difference]: Finished difference Result 6950 states and 29841 transitions. [2021-07-09 17:54:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:54:18,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:18,467 INFO L225 Difference]: With dead ends: 6950 [2021-07-09 17:54:18,467 INFO L226 Difference]: Without dead ends: 6891 [2021-07-09 17:54:18,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1257.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:54:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-07-09 17:54:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6471. [2021-07-09 17:54:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6471 states, 6470 states have (on average 4.332921174652241) internal successors, (28034), 6470 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 28034 transitions. [2021-07-09 17:54:18,586 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 28034 transitions. Word has length 33 [2021-07-09 17:54:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:18,586 INFO L482 AbstractCegarLoop]: Abstraction has 6471 states and 28034 transitions. [2021-07-09 17:54:18,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 28034 transitions. [2021-07-09 17:54:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:18,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:18,598 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, 1, 1, 1] [2021-07-09 17:54:18,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:18,799 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1528202498, now seen corresponding path program 61 times [2021-07-09 17:54:18,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:18,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082840652] [2021-07-09 17:54:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:18,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:18,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082840652] [2021-07-09 17:54:18,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082840652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:18,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938846734] [2021-07-09 17:54:18,952 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 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 [2021-07-09 17:54:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:19,131 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 28 treesize of output 12 [2021-07-09 17:54:19,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:19,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:19,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:19,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:54:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:19,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938846734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:19,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:19,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974447024] [2021-07-09 17:54:19,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:19,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:19,217 INFO L87 Difference]: Start difference. First operand 6471 states and 28034 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:20,549 INFO L93 Difference]: Finished difference Result 8470 states and 35739 transitions. [2021-07-09 17:54:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:54:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:20,573 INFO L225 Difference]: With dead ends: 8470 [2021-07-09 17:54:20,573 INFO L226 Difference]: Without dead ends: 8420 [2021-07-09 17:54:20,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:54:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8420 states. [2021-07-09 17:54:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8420 to 6765. [2021-07-09 17:54:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 4.344766410408043) internal successors, (29388), 6764 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 29388 transitions. [2021-07-09 17:54:20,717 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 29388 transitions. Word has length 33 [2021-07-09 17:54:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:20,718 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 29388 transitions. [2021-07-09 17:54:20,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 29388 transitions. [2021-07-09 17:54:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:20,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:20,730 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, 1, 1, 1] [2021-07-09 17:54:20,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 17:54:20,937 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1463492192, now seen corresponding path program 62 times [2021-07-09 17:54:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:20,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116486373] [2021-07-09 17:54:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:21,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116486373] [2021-07-09 17:54:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116486373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:21,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290578675] [2021-07-09 17:54:21,092 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 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 [2021-07-09 17:54:21,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:21,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:21,311 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:21,311 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 27 treesize of output 55 [2021-07-09 17:54:21,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:21,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:21,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:21,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:54:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:21,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290578675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:21,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:21,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:54:21,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596822755] [2021-07-09 17:54:21,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:54:21,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:54:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:21,456 INFO L87 Difference]: Start difference. First operand 6765 states and 29388 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:23,041 INFO L93 Difference]: Finished difference Result 8081 states and 34208 transitions. [2021-07-09 17:54:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:54:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:23,064 INFO L225 Difference]: With dead ends: 8081 [2021-07-09 17:54:23,064 INFO L226 Difference]: Without dead ends: 8059 [2021-07-09 17:54:23,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1104.7ms TimeCoverageRelationStatistics Valid=339, Invalid=2417, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:54:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-07-09 17:54:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 6725. [2021-07-09 17:54:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 4.343694229625223) internal successors, (29207), 6724 states have internal predecessors, (29207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 29207 transitions. [2021-07-09 17:54:23,198 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 29207 transitions. Word has length 33 [2021-07-09 17:54:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:23,198 INFO L482 AbstractCegarLoop]: Abstraction has 6725 states and 29207 transitions. [2021-07-09 17:54:23,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 29207 transitions. [2021-07-09 17:54:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:23,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:23,211 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, 1, 1, 1] [2021-07-09 17:54:23,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:23,411 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1932113032, now seen corresponding path program 63 times [2021-07-09 17:54:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:23,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121838563] [2021-07-09 17:54:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:23,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121838563] [2021-07-09 17:54:23,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121838563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824408008] [2021-07-09 17:54:23,633 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 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 [2021-07-09 17:54:23,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:54:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:23,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:23,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:23,857 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:23,857 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 27 treesize of output 55 [2021-07-09 17:54:23,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:23,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:23,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:23,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:54:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824408008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:24,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:54:24,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420914335] [2021-07-09 17:54:24,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:54:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:54:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:24,006 INFO L87 Difference]: Start difference. First operand 6725 states and 29207 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:24,775 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-09 17:54:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:27,082 INFO L93 Difference]: Finished difference Result 8076 states and 34225 transitions. [2021-07-09 17:54:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 17:54:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:27,105 INFO L225 Difference]: With dead ends: 8076 [2021-07-09 17:54:27,105 INFO L226 Difference]: Without dead ends: 8046 [2021-07-09 17:54:27,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2474.2ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:54:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8046 states. [2021-07-09 17:54:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8046 to 6676. [2021-07-09 17:54:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 4.3417228464419475) internal successors, (28981), 6675 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 28981 transitions. [2021-07-09 17:54:27,256 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 28981 transitions. Word has length 33 [2021-07-09 17:54:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:27,256 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 28981 transitions. [2021-07-09 17:54:27,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 28981 transitions. [2021-07-09 17:54:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:27,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:27,268 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, 1, 1, 1] [2021-07-09 17:54:27,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-07-09 17:54:27,469 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 151514730, now seen corresponding path program 64 times [2021-07-09 17:54:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:27,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033716538] [2021-07-09 17:54:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:27,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033716538] [2021-07-09 17:54:27,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033716538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385936232] [2021-07-09 17:54:27,699 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 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 [2021-07-09 17:54:27,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:27,889 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 28 treesize of output 12 [2021-07-09 17:54:27,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:27,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:27,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:27,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:54:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:27,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385936232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:27,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:27,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:54:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304133536] [2021-07-09 17:54:27,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:27,970 INFO L87 Difference]: Start difference. First operand 6676 states and 28981 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:29,911 INFO L93 Difference]: Finished difference Result 8754 states and 36818 transitions. [2021-07-09 17:54:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:54:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:29,934 INFO L225 Difference]: With dead ends: 8754 [2021-07-09 17:54:29,934 INFO L226 Difference]: Without dead ends: 8710 [2021-07-09 17:54:29,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1380.8ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:54:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-07-09 17:54:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 6742. [2021-07-09 17:54:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 6741 states have (on average 4.34816792760718) internal successors, (29311), 6741 states have internal predecessors, (29311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 29311 transitions. [2021-07-09 17:54:30,074 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 29311 transitions. Word has length 33 [2021-07-09 17:54:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:30,074 INFO L482 AbstractCegarLoop]: Abstraction has 6742 states and 29311 transitions. [2021-07-09 17:54:30,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 29311 transitions. [2021-07-09 17:54:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:30,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:30,087 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, 1, 1, 1] [2021-07-09 17:54:30,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:54:30,288 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2047434818, now seen corresponding path program 65 times [2021-07-09 17:54:30,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:30,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911838097] [2021-07-09 17:54:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:30,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:30,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911838097] [2021-07-09 17:54:30,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911838097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:30,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673161723] [2021-07-09 17:54:30,466 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 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 [2021-07-09 17:54:30,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:54:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:30,654 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 [2021-07-09 17:54:30,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:30,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:30,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:30,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:54:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:30,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673161723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:30,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:30,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:30,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917435554] [2021-07-09 17:54:30,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:30,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:30,733 INFO L87 Difference]: Start difference. First operand 6742 states and 29311 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:31,993 INFO L93 Difference]: Finished difference Result 7478 states and 32071 transitions. [2021-07-09 17:54:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:54:31,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:32,014 INFO L225 Difference]: With dead ends: 7478 [2021-07-09 17:54:32,014 INFO L226 Difference]: Without dead ends: 7429 [2021-07-09 17:54:32,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:54:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2021-07-09 17:54:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 6727. [2021-07-09 17:54:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 4.349093071662207) internal successors, (29252), 6726 states have internal predecessors, (29252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 29252 transitions. [2021-07-09 17:54:32,142 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 29252 transitions. Word has length 33 [2021-07-09 17:54:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:32,142 INFO L482 AbstractCegarLoop]: Abstraction has 6727 states and 29252 transitions. [2021-07-09 17:54:32,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 29252 transitions. [2021-07-09 17:54:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:32,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:32,155 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, 1, 1, 1] [2021-07-09 17:54:32,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 17:54:32,356 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1803518248, now seen corresponding path program 66 times [2021-07-09 17:54:32,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:32,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366107777] [2021-07-09 17:54:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:32,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:32,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366107777] [2021-07-09 17:54:32,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366107777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:32,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160944120] [2021-07-09 17:54:32,511 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 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 [2021-07-09 17:54:32,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:54:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:54:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:32,820 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:32,820 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 29 treesize of output 57 [2021-07-09 17:54:32,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:32,840 INFO L628 ElimStorePlain]: treesize reduction 42, result has 32.3 percent of original size [2021-07-09 17:54:32,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:32,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-09 17:54:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:32,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160944120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:32,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:32,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:54:32,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096312156] [2021-07-09 17:54:32,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:54:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:54:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:32,927 INFO L87 Difference]: Start difference. First operand 6727 states and 29252 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:34,481 INFO L93 Difference]: Finished difference Result 7339 states and 31508 transitions. [2021-07-09 17:54:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:54:34,482 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:34,502 INFO L225 Difference]: With dead ends: 7339 [2021-07-09 17:54:34,502 INFO L226 Difference]: Without dead ends: 7274 [2021-07-09 17:54:34,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1230.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:54:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-07-09 17:54:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6718. [2021-07-09 17:54:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6717 states have (on average 4.3476254280184605) internal successors, (29203), 6717 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 29203 transitions. [2021-07-09 17:54:34,629 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 29203 transitions. Word has length 33 [2021-07-09 17:54:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:34,629 INFO L482 AbstractCegarLoop]: Abstraction has 6718 states and 29203 transitions. [2021-07-09 17:54:34,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 29203 transitions. [2021-07-09 17:54:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:34,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:34,642 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, 1, 1, 1] [2021-07-09 17:54:34,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:34,843 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -455603768, now seen corresponding path program 67 times [2021-07-09 17:54:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:34,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296774187] [2021-07-09 17:54:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:34,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:34,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296774187] [2021-07-09 17:54:34,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296774187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:34,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272750882] [2021-07-09 17:54:34,996 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 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 [2021-07-09 17:54:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:35,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:35,185 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 28 treesize of output 12 [2021-07-09 17:54:35,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:35,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:35,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:35,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:54:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:35,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272750882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:35,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:35,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:35,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736063799] [2021-07-09 17:54:35,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:35,266 INFO L87 Difference]: Start difference. First operand 6718 states and 29203 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:36,529 INFO L93 Difference]: Finished difference Result 8157 states and 34663 transitions. [2021-07-09 17:54:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:54:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:36,552 INFO L225 Difference]: With dead ends: 8157 [2021-07-09 17:54:36,552 INFO L226 Difference]: Without dead ends: 8107 [2021-07-09 17:54:36,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1002.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:54:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2021-07-09 17:54:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 6966. [2021-07-09 17:54:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 4.353481694185212) internal successors, (30322), 6965 states have internal predecessors, (30322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 30322 transitions. [2021-07-09 17:54:36,697 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 30322 transitions. Word has length 33 [2021-07-09 17:54:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:36,697 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 30322 transitions. [2021-07-09 17:54:36,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 30322 transitions. [2021-07-09 17:54:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:36,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:36,711 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, 1, 1, 1] [2021-07-09 17:54:36,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:36,912 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:36,912 INFO L82 PathProgramCache]: Analyzing trace with hash 847668838, now seen corresponding path program 68 times [2021-07-09 17:54:36,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:36,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405262808] [2021-07-09 17:54:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:37,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405262808] [2021-07-09 17:54:37,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405262808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:37,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602362016] [2021-07-09 17:54:37,064 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 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 [2021-07-09 17:54:37,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:37,284 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:37,284 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-09 17:54:37,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:37,311 INFO L628 ElimStorePlain]: treesize reduction 67, result has 24.7 percent of original size [2021-07-09 17:54:37,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:37,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:54:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:37,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602362016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:37,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:37,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:54:37,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488506109] [2021-07-09 17:54:37,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:54:37,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:54:37,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:37,451 INFO L87 Difference]: Start difference. First operand 6966 states and 30322 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:38,866 INFO L93 Difference]: Finished difference Result 8100 states and 34390 transitions. [2021-07-09 17:54:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:54:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:38,888 INFO L225 Difference]: With dead ends: 8100 [2021-07-09 17:54:38,889 INFO L226 Difference]: Without dead ends: 8078 [2021-07-09 17:54:38,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1096.2ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:54:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-07-09 17:54:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 6917. [2021-07-09 17:54:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353817235396183) internal successors, (30111), 6916 states have internal predecessors, (30111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30111 transitions. [2021-07-09 17:54:39,024 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30111 transitions. Word has length 33 [2021-07-09 17:54:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:39,024 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30111 transitions. [2021-07-09 17:54:39,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30111 transitions. [2021-07-09 17:54:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:39,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:39,038 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, 1, 1, 1] [2021-07-09 17:54:39,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-07-09 17:54:39,239 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -51693234, now seen corresponding path program 69 times [2021-07-09 17:54:39,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:39,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36613683] [2021-07-09 17:54:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:39,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36613683] [2021-07-09 17:54:39,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36613683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545442847] [2021-07-09 17:54:39,449 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 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 [2021-07-09 17:54:39,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:54:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:39,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:39,674 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:39,675 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 27 treesize of output 55 [2021-07-09 17:54:39,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:39,701 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-07-09 17:54:39,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:39,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:54:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:39,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545442847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:39,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:39,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:54:39,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567524075] [2021-07-09 17:54:39,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:54:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:54:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:54:39,837 INFO L87 Difference]: Start difference. First operand 6917 states and 30111 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:40,703 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-07-09 17:54:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:43,350 INFO L93 Difference]: Finished difference Result 7942 states and 34054 transitions. [2021-07-09 17:54:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 17:54:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:43,372 INFO L225 Difference]: With dead ends: 7942 [2021-07-09 17:54:43,373 INFO L226 Difference]: Without dead ends: 7927 [2021-07-09 17:54:43,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2813.1ms TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:54:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-07-09 17:54:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 6917. [2021-07-09 17:54:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353383458646617) internal successors, (30108), 6916 states have internal predecessors, (30108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30108 transitions. [2021-07-09 17:54:43,518 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30108 transitions. Word has length 33 [2021-07-09 17:54:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:43,518 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30108 transitions. [2021-07-09 17:54:43,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30108 transitions. [2021-07-09 17:54:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:43,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:43,533 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, 1, 1, 1] [2021-07-09 17:54:43,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:54:43,750 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1832291536, now seen corresponding path program 70 times [2021-07-09 17:54:43,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:43,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748328438] [2021-07-09 17:54:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:43,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748328438] [2021-07-09 17:54:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748328438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004330118] [2021-07-09 17:54:43,951 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 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 [2021-07-09 17:54:43,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:44,129 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 28 treesize of output 12 [2021-07-09 17:54:44,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:44,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:44,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:44,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:54:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:44,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004330118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:44,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:44,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:54:44,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736160463] [2021-07-09 17:54:44,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:54:44,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:54:44,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:54:44,210 INFO L87 Difference]: Start difference. First operand 6917 states and 30108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:46,292 INFO L93 Difference]: Finished difference Result 8117 states and 34723 transitions. [2021-07-09 17:54:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:54:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:46,315 INFO L225 Difference]: With dead ends: 8117 [2021-07-09 17:54:46,315 INFO L226 Difference]: Without dead ends: 8082 [2021-07-09 17:54:46,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1677.2ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:54:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-07-09 17:54:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 6853. [2021-07-09 17:54:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.355662580268535) internal successors, (29845), 6852 states have internal predecessors, (29845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29845 transitions. [2021-07-09 17:54:46,459 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29845 transitions. Word has length 33 [2021-07-09 17:54:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:46,459 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29845 transitions. [2021-07-09 17:54:46,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29845 transitions. [2021-07-09 17:54:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:46,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:46,473 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, 1, 1, 1] [2021-07-09 17:54:46,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:46,673 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash 63628552, now seen corresponding path program 71 times [2021-07-09 17:54:46,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:46,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688433051] [2021-07-09 17:54:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:46,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688433051] [2021-07-09 17:54:46,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688433051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:46,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390452149] [2021-07-09 17:54:46,825 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 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 [2021-07-09 17:54:46,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:54:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:47,007 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 [2021-07-09 17:54:47,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:47,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:47,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:47,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:54:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390452149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:47,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:47,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280105420] [2021-07-09 17:54:47,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:47,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:47,087 INFO L87 Difference]: Start difference. First operand 6853 states and 29845 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:48,378 INFO L93 Difference]: Finished difference Result 7506 states and 32235 transitions. [2021-07-09 17:54:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:54:48,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:48,399 INFO L225 Difference]: With dead ends: 7506 [2021-07-09 17:54:48,400 INFO L226 Difference]: Without dead ends: 7457 [2021-07-09 17:54:48,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1063.8ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:54:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-07-09 17:54:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6808. [2021-07-09 17:54:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.354047304245629) internal successors, (29638), 6807 states have internal predecessors, (29638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29638 transitions. [2021-07-09 17:54:48,530 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29638 transitions. Word has length 33 [2021-07-09 17:54:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:48,530 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29638 transitions. [2021-07-09 17:54:48,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29638 transitions. [2021-07-09 17:54:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:48,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:48,543 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, 1, 1, 1] [2021-07-09 17:54:48,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:48,743 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash -180288018, now seen corresponding path program 72 times [2021-07-09 17:54:48,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:48,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110588618] [2021-07-09 17:54:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:48,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110588618] [2021-07-09 17:54:48,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110588618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:48,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215128840] [2021-07-09 17:54:48,900 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 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 [2021-07-09 17:54:48,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:54:48,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:54:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:49,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:49,221 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:54:49,221 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 29 treesize of output 57 [2021-07-09 17:54:49,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:54:49,261 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-07-09 17:54:49,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:49,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-07-09 17:54:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215128840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:49,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:49,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:54:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601051571] [2021-07-09 17:54:49,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:54:49,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:54:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:54:49,351 INFO L87 Difference]: Start difference. First operand 6808 states and 29638 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:50,981 INFO L93 Difference]: Finished difference Result 7476 states and 31984 transitions. [2021-07-09 17:54:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:54:50,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:51,004 INFO L225 Difference]: With dead ends: 7476 [2021-07-09 17:54:51,004 INFO L226 Difference]: Without dead ends: 7411 [2021-07-09 17:54:51,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1252.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:54:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-07-09 17:54:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6766. [2021-07-09 17:54:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 4.349445676274945) internal successors, (29424), 6765 states have internal predecessors, (29424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 29424 transitions. [2021-07-09 17:54:51,142 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 29424 transitions. Word has length 33 [2021-07-09 17:54:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:51,142 INFO L482 AbstractCegarLoop]: Abstraction has 6766 states and 29424 transitions. [2021-07-09 17:54:51,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 29424 transitions. [2021-07-09 17:54:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:51,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:51,155 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, 1, 1, 1] [2021-07-09 17:54:51,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:51,355 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1974387976, now seen corresponding path program 73 times [2021-07-09 17:54:51,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:51,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764435303] [2021-07-09 17:54:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:51,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:51,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764435303] [2021-07-09 17:54:51,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764435303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:51,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53954814] [2021-07-09 17:54:51,534 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 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 [2021-07-09 17:54:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:51,803 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 [2021-07-09 17:54:51,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:51,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:51,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:51,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:54:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:51,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53954814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:51,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:51,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:54:51,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320081514] [2021-07-09 17:54:51,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:51,861 INFO L87 Difference]: Start difference. First operand 6766 states and 29424 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:52,923 INFO L93 Difference]: Finished difference Result 7141 states and 30729 transitions. [2021-07-09 17:54:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:54:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:52,945 INFO L225 Difference]: With dead ends: 7141 [2021-07-09 17:54:52,945 INFO L226 Difference]: Without dead ends: 7080 [2021-07-09 17:54:52,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 871.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:54:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2021-07-09 17:54:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 6772. [2021-07-09 17:54:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 6771 states have (on average 4.347954511888938) internal successors, (29440), 6771 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 29440 transitions. [2021-07-09 17:54:53,078 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 29440 transitions. Word has length 33 [2021-07-09 17:54:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:53,078 INFO L482 AbstractCegarLoop]: Abstraction has 6772 states and 29440 transitions. [2021-07-09 17:54:53,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 29440 transitions. [2021-07-09 17:54:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:53,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:53,091 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, 1, 1, 1] [2021-07-09 17:54:53,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 17:54:53,292 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1523142808, now seen corresponding path program 74 times [2021-07-09 17:54:53,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:53,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941237749] [2021-07-09 17:54:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:53,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:53,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941237749] [2021-07-09 17:54:53,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941237749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:53,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058758646] [2021-07-09 17:54:53,456 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 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 [2021-07-09 17:54:53,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:54:53,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:53,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:53,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:53,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:54:53,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:53,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:53,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:53,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-09 17:54:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058758646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:53,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:53,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:54:53,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340023190] [2021-07-09 17:54:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:53,865 INFO L87 Difference]: Start difference. First operand 6772 states and 29440 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:55,011 INFO L93 Difference]: Finished difference Result 7493 states and 32124 transitions. [2021-07-09 17:54:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:54:55,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:55,032 INFO L225 Difference]: With dead ends: 7493 [2021-07-09 17:54:55,032 INFO L226 Difference]: Without dead ends: 7447 [2021-07-09 17:54:55,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:54:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2021-07-09 17:54:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 6745. [2021-07-09 17:54:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6744 states have (on average 4.347419928825623) internal successors, (29319), 6744 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 29319 transitions. [2021-07-09 17:54:55,157 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 29319 transitions. Word has length 33 [2021-07-09 17:54:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:55,157 INFO L482 AbstractCegarLoop]: Abstraction has 6745 states and 29319 transitions. [2021-07-09 17:54:55,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 29319 transitions. [2021-07-09 17:54:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:55,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:55,170 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, 1, 1, 1] [2021-07-09 17:54:55,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:54:55,370 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:55,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1029994050, now seen corresponding path program 75 times [2021-07-09 17:54:55,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:55,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401544180] [2021-07-09 17:54:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:55,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:55,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401544180] [2021-07-09 17:54:55,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401544180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:55,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301794432] [2021-07-09 17:54:55,528 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 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 [2021-07-09 17:54:55,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:54:55,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:55,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:55,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:54:55,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:55,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:55,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:55,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 17:54:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:56,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301794432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:56,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:56,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:54:56,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101900075] [2021-07-09 17:54:56,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:54:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:54:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:54:56,004 INFO L87 Difference]: Start difference. First operand 6745 states and 29319 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:54:58,277 INFO L93 Difference]: Finished difference Result 8079 states and 34659 transitions. [2021-07-09 17:54:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:54:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:54:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:54:58,300 INFO L225 Difference]: With dead ends: 8079 [2021-07-09 17:54:58,300 INFO L226 Difference]: Without dead ends: 8060 [2021-07-09 17:54:58,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1890.0ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:54:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-07-09 17:54:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6853. [2021-07-09 17:54:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.350992410974897) internal successors, (29813), 6852 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29813 transitions. [2021-07-09 17:54:58,460 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29813 transitions. Word has length 33 [2021-07-09 17:54:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:54:58,460 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29813 transitions. [2021-07-09 17:54:58,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:54:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29813 transitions. [2021-07-09 17:54:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:54:58,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:54:58,474 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, 1, 1, 1] [2021-07-09 17:54:58,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 17:54:58,674 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:54:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:54:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash 273278556, now seen corresponding path program 76 times [2021-07-09 17:54:58,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:54:58,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361686205] [2021-07-09 17:54:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:54:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:54:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:58,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:54:58,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361686205] [2021-07-09 17:54:58,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361686205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:58,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354870005] [2021-07-09 17:54:58,816 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 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 [2021-07-09 17:54:58,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:54:58,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:54:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:54:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:54:58,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:54:58,986 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 28 treesize of output 12 [2021-07-09 17:54:58,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:54:58,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:54:58,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:54:58,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:54:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:54:59,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354870005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:54:59,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:54:59,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:54:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898149917] [2021-07-09 17:54:59,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:54:59,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:54:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:54:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:54:59,062 INFO L87 Difference]: Start difference. First operand 6853 states and 29813 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:00,132 INFO L93 Difference]: Finished difference Result 8584 states and 36474 transitions. [2021-07-09 17:55:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:55:00,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:00,156 INFO L225 Difference]: With dead ends: 8584 [2021-07-09 17:55:00,156 INFO L226 Difference]: Without dead ends: 8556 [2021-07-09 17:55:00,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:55:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-07-09 17:55:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6958. [2021-07-09 17:55:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6957 states have (on average 4.358919074313641) internal successors, (30325), 6957 states have internal predecessors, (30325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 30325 transitions. [2021-07-09 17:55:00,363 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 30325 transitions. Word has length 33 [2021-07-09 17:55:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:00,363 INFO L482 AbstractCegarLoop]: Abstraction has 6958 states and 30325 transitions. [2021-07-09 17:55:00,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 30325 transitions. [2021-07-09 17:55:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:00,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:00,377 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, 1, 1, 1] [2021-07-09 17:55:00,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:00,581 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash 219892036, now seen corresponding path program 77 times [2021-07-09 17:55:00,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:00,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782902203] [2021-07-09 17:55:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:00,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:00,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782902203] [2021-07-09 17:55:00,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782902203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:00,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69653196] [2021-07-09 17:55:00,730 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 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 [2021-07-09 17:55:00,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:55:00,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:00,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:00,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:00,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-09 17:55:00,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:00,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:00,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:00,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:55:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:00,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69653196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:00,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:00,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:55:00,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283026170] [2021-07-09 17:55:00,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:00,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:00,975 INFO L87 Difference]: Start difference. First operand 6958 states and 30325 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:02,049 INFO L93 Difference]: Finished difference Result 8561 states and 36382 transitions. [2021-07-09 17:55:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:55:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:02,074 INFO L225 Difference]: With dead ends: 8561 [2021-07-09 17:55:02,074 INFO L226 Difference]: Without dead ends: 8528 [2021-07-09 17:55:02,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:55:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8528 states. [2021-07-09 17:55:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8528 to 6933. [2021-07-09 17:55:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6932 states have (on average 4.360357761107905) internal successors, (30226), 6932 states have internal predecessors, (30226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 30226 transitions. [2021-07-09 17:55:02,295 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 30226 transitions. Word has length 33 [2021-07-09 17:55:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:02,295 INFO L482 AbstractCegarLoop]: Abstraction has 6933 states and 30226 transitions. [2021-07-09 17:55:02,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 30226 transitions. [2021-07-09 17:55:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:02,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:02,308 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, 1, 1, 1] [2021-07-09 17:55:02,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:02,509 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2012246164, now seen corresponding path program 78 times [2021-07-09 17:55:02,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:02,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419364540] [2021-07-09 17:55:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:02,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419364540] [2021-07-09 17:55:02,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419364540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345807236] [2021-07-09 17:55:02,666 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 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 [2021-07-09 17:55:02,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:55:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:55:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:02,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:02,861 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 26 treesize of output 32 [2021-07-09 17:55:02,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:02,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:02,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:02,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:39 [2021-07-09 17:55:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:03,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345807236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:03,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:03,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:55:03,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871598307] [2021-07-09 17:55:03,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:03,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:03,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:03,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:03,014 INFO L87 Difference]: Start difference. First operand 6933 states and 30226 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:04,549 INFO L93 Difference]: Finished difference Result 7914 states and 34231 transitions. [2021-07-09 17:55:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:55:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:04,614 INFO L225 Difference]: With dead ends: 7914 [2021-07-09 17:55:04,615 INFO L226 Difference]: Without dead ends: 7899 [2021-07-09 17:55:04,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1118.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:55:04,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7899 states. [2021-07-09 17:55:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 6921. [2021-07-09 17:55:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.361705202312138) internal successors, (30183), 6920 states have internal predecessors, (30183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30183 transitions. [2021-07-09 17:55:04,740 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30183 transitions. Word has length 33 [2021-07-09 17:55:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:04,740 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30183 transitions. [2021-07-09 17:55:04,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30183 transitions. [2021-07-09 17:55:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:04,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:04,753 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, 1, 1, 1] [2021-07-09 17:55:04,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:04,954 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash 63209602, now seen corresponding path program 79 times [2021-07-09 17:55:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:04,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546531613] [2021-07-09 17:55:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:05,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546531613] [2021-07-09 17:55:05,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546531613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020429114] [2021-07-09 17:55:05,111 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 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 [2021-07-09 17:55:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:05,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:05,325 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 28 treesize of output 12 [2021-07-09 17:55:05,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:05,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:05,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:05,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-09 17:55:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:05,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020429114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:05,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:05,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:05,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910257119] [2021-07-09 17:55:05,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:05,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:05,385 INFO L87 Difference]: Start difference. First operand 6921 states and 30183 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:06,515 INFO L93 Difference]: Finished difference Result 7735 states and 33462 transitions. [2021-07-09 17:55:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:55:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:06,536 INFO L225 Difference]: With dead ends: 7735 [2021-07-09 17:55:06,536 INFO L226 Difference]: Without dead ends: 7720 [2021-07-09 17:55:06,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:55:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2021-07-09 17:55:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 6921. [2021-07-09 17:55:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.3621387283237) internal successors, (30186), 6920 states have internal predecessors, (30186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30186 transitions. [2021-07-09 17:55:06,710 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30186 transitions. Word has length 33 [2021-07-09 17:55:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:06,711 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30186 transitions. [2021-07-09 17:55:06,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30186 transitions. [2021-07-09 17:55:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:06,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:06,724 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, 1, 1, 1] [2021-07-09 17:55:06,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:06,925 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash 919293570, now seen corresponding path program 80 times [2021-07-09 17:55:06,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:06,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401547046] [2021-07-09 17:55:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:07,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:07,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401547046] [2021-07-09 17:55:07,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401547046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:07,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488190476] [2021-07-09 17:55:07,082 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 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 [2021-07-09 17:55:07,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:07,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:07,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:55:07,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:07,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:07,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:07,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:55:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:07,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488190476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:07,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:07,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:55:07,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122510163] [2021-07-09 17:55:07,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:07,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:07,475 INFO L87 Difference]: Start difference. First operand 6921 states and 30186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:09,839 INFO L93 Difference]: Finished difference Result 7947 states and 34282 transitions. [2021-07-09 17:55:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:55:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:09,862 INFO L225 Difference]: With dead ends: 7947 [2021-07-09 17:55:09,862 INFO L226 Difference]: Without dead ends: 7928 [2021-07-09 17:55:09,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2145.6ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:55:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-07-09 17:55:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7007. [2021-07-09 17:55:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 4.363260062803311) internal successors, (30569), 7006 states have internal predecessors, (30569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 30569 transitions. [2021-07-09 17:55:10,002 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 30569 transitions. Word has length 33 [2021-07-09 17:55:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:10,002 INFO L482 AbstractCegarLoop]: Abstraction has 7007 states and 30569 transitions. [2021-07-09 17:55:10,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 30569 transitions. [2021-07-09 17:55:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:10,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:10,016 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, 1, 1, 1] [2021-07-09 17:55:10,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 17:55:10,216 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:10,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2072401120, now seen corresponding path program 81 times [2021-07-09 17:55:10,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:10,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968900414] [2021-07-09 17:55:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:10,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968900414] [2021-07-09 17:55:10,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968900414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334090616] [2021-07-09 17:55:10,364 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 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 [2021-07-09 17:55:10,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:55:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:10,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:55:10,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:10,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:10,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:10,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:55:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334090616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:10,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:10,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:55:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465031595] [2021-07-09 17:55:10,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:10,719 INFO L87 Difference]: Start difference. First operand 7007 states and 30569 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:11,064 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-07-09 17:55:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:12,599 INFO L93 Difference]: Finished difference Result 7712 states and 33332 transitions. [2021-07-09 17:55:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:55:12,600 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:12,621 INFO L225 Difference]: With dead ends: 7712 [2021-07-09 17:55:12,621 INFO L226 Difference]: Without dead ends: 7699 [2021-07-09 17:55:12,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1665.9ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:55:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-07-09 17:55:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 6991. [2021-07-09 17:55:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 4.365951359084407) internal successors, (30518), 6990 states have internal predecessors, (30518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 30518 transitions. [2021-07-09 17:55:12,761 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 30518 transitions. Word has length 33 [2021-07-09 17:55:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:12,761 INFO L482 AbstractCegarLoop]: Abstraction has 6991 states and 30518 transitions. [2021-07-09 17:55:12,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 30518 transitions. [2021-07-09 17:55:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:12,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:12,776 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, 1, 1, 1] [2021-07-09 17:55:12,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:12,976 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1323204104, now seen corresponding path program 82 times [2021-07-09 17:55:12,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:12,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369752679] [2021-07-09 17:55:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:13,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:13,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369752679] [2021-07-09 17:55:13,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369752679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:13,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492083779] [2021-07-09 17:55:13,137 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 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 [2021-07-09 17:55:13,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:13,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:13,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:13,324 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 [2021-07-09 17:55:13,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:13,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:13,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:13,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:55:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:13,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492083779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:13,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:13,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:13,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970095650] [2021-07-09 17:55:13,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:13,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:13,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:13,418 INFO L87 Difference]: Start difference. First operand 6991 states and 30518 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:14,777 INFO L93 Difference]: Finished difference Result 8547 states and 36564 transitions. [2021-07-09 17:55:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:55:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:14,801 INFO L225 Difference]: With dead ends: 8547 [2021-07-09 17:55:14,801 INFO L226 Difference]: Without dead ends: 8517 [2021-07-09 17:55:14,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1145.1ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:55:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-07-09 17:55:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 7100. [2021-07-09 17:55:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7100 states, 7099 states have (on average 4.368643470911396) internal successors, (31013), 7099 states have internal predecessors, (31013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 31013 transitions. [2021-07-09 17:55:14,957 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 31013 transitions. Word has length 33 [2021-07-09 17:55:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:14,957 INFO L482 AbstractCegarLoop]: Abstraction has 7100 states and 31013 transitions. [2021-07-09 17:55:14,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 31013 transitions. [2021-07-09 17:55:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:14,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:14,971 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, 1, 1, 1] [2021-07-09 17:55:15,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:15,172 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2125787640, now seen corresponding path program 83 times [2021-07-09 17:55:15,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:15,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770315419] [2021-07-09 17:55:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:15,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:15,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770315419] [2021-07-09 17:55:15,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770315419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:15,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154105787] [2021-07-09 17:55:15,361 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 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 [2021-07-09 17:55:15,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:55:15,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:15,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:15,509 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 29 treesize of output 13 [2021-07-09 17:55:15,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:15,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:15,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:15,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:55:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154105787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:15,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:55:15,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905080310] [2021-07-09 17:55:15,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:55:15,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:55:15,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:55:15,596 INFO L87 Difference]: Start difference. First operand 7100 states and 31013 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:16,646 INFO L93 Difference]: Finished difference Result 8299 states and 35564 transitions. [2021-07-09 17:55:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:55:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:16,671 INFO L225 Difference]: With dead ends: 8299 [2021-07-09 17:55:16,671 INFO L226 Difference]: Without dead ends: 8262 [2021-07-09 17:55:16,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:55:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-07-09 17:55:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 7060. [2021-07-09 17:55:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 4.370307408981442) internal successors, (30850), 7059 states have internal predecessors, (30850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 30850 transitions. [2021-07-09 17:55:16,824 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 30850 transitions. Word has length 33 [2021-07-09 17:55:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:16,824 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 30850 transitions. [2021-07-09 17:55:16,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 30850 transitions. [2021-07-09 17:55:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:16,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:16,838 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, 1, 1, 1] [2021-07-09 17:55:17,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:17,039 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash -62958544, now seen corresponding path program 84 times [2021-07-09 17:55:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:17,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926317323] [2021-07-09 17:55:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:17,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926317323] [2021-07-09 17:55:17,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926317323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49420133] [2021-07-09 17:55:17,206 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 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 [2021-07-09 17:55:17,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:55:17,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:17,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:17,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:55:17,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:17,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:17,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:17,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:55:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49420133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:17,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:17,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:55:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367157193] [2021-07-09 17:55:17,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:55:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:55:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:55:17,622 INFO L87 Difference]: Start difference. First operand 7060 states and 30850 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:18,889 INFO L93 Difference]: Finished difference Result 7670 states and 33332 transitions. [2021-07-09 17:55:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:55:18,889 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:18,910 INFO L225 Difference]: With dead ends: 7670 [2021-07-09 17:55:18,910 INFO L226 Difference]: Without dead ends: 7655 [2021-07-09 17:55:18,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1134.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7655 states. [2021-07-09 17:55:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7655 to 7045. [2021-07-09 17:55:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7045 states, 7044 states have (on average 4.371663827370812) internal successors, (30794), 7044 states have internal predecessors, (30794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 30794 transitions. [2021-07-09 17:55:19,036 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 30794 transitions. Word has length 33 [2021-07-09 17:55:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:19,036 INFO L482 AbstractCegarLoop]: Abstraction has 7045 states and 30794 transitions. [2021-07-09 17:55:19,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 30794 transitions. [2021-07-09 17:55:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:19,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:19,092 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, 1, 1, 1] [2021-07-09 17:55:19,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:19,293 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:19,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1111730946, now seen corresponding path program 85 times [2021-07-09 17:55:19,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:19,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388615718] [2021-07-09 17:55:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:19,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388615718] [2021-07-09 17:55:19,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388615718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504952237] [2021-07-09 17:55:19,453 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 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 [2021-07-09 17:55:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:19,598 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 [2021-07-09 17:55:19,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:19,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:19,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:19,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:55:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:19,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504952237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:19,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:19,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:55:19,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055808213] [2021-07-09 17:55:19,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:19,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:19,686 INFO L87 Difference]: Start difference. First operand 7045 states and 30794 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:21,223 INFO L93 Difference]: Finished difference Result 8598 states and 36819 transitions. [2021-07-09 17:55:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:55:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:21,248 INFO L225 Difference]: With dead ends: 8598 [2021-07-09 17:55:21,248 INFO L226 Difference]: Without dead ends: 8560 [2021-07-09 17:55:21,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1235.1ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:55:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2021-07-09 17:55:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 7222. [2021-07-09 17:55:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 7221 states have (on average 4.377371555186262) internal successors, (31609), 7221 states have internal predecessors, (31609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 31609 transitions. [2021-07-09 17:55:21,430 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 31609 transitions. Word has length 33 [2021-07-09 17:55:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:21,430 INFO L482 AbstractCegarLoop]: Abstraction has 7222 states and 31609 transitions. [2021-07-09 17:55:21,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 31609 transitions. [2021-07-09 17:55:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:21,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:21,445 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, 1, 1, 1] [2021-07-09 17:55:21,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:21,646 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash 191541660, now seen corresponding path program 86 times [2021-07-09 17:55:21,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:21,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976494815] [2021-07-09 17:55:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:21,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:21,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976494815] [2021-07-09 17:55:21,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976494815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:21,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699456867] [2021-07-09 17:55:21,803 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 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 [2021-07-09 17:55:21,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:21,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:21,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:21,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:21,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:55:21,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:21,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:21,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:21,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:55:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:22,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699456867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:22,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:22,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:55:22,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603440691] [2021-07-09 17:55:22,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:22,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:22,161 INFO L87 Difference]: Start difference. First operand 7222 states and 31609 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:23,985 INFO L93 Difference]: Finished difference Result 8005 states and 34609 transitions. [2021-07-09 17:55:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:55:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:24,008 INFO L225 Difference]: With dead ends: 8005 [2021-07-09 17:55:24,008 INFO L226 Difference]: Without dead ends: 7992 [2021-07-09 17:55:24,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1480.5ms TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:55:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2021-07-09 17:55:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 7222. [2021-07-09 17:55:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 7221 states have (on average 4.376956100263121) internal successors, (31606), 7221 states have internal predecessors, (31606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 31606 transitions. [2021-07-09 17:55:24,149 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 31606 transitions. Word has length 33 [2021-07-09 17:55:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:24,149 INFO L482 AbstractCegarLoop]: Abstraction has 7222 states and 31606 transitions. [2021-07-09 17:55:24,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 31606 transitions. [2021-07-09 17:55:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:24,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:24,164 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, 1, 1, 1] [2021-07-09 17:55:24,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:24,365 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:24,366 INFO L82 PathProgramCache]: Analyzing trace with hash -707820412, now seen corresponding path program 87 times [2021-07-09 17:55:24,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:24,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655554011] [2021-07-09 17:55:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:24,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655554011] [2021-07-09 17:55:24,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655554011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150729969] [2021-07-09 17:55:24,540 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 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 [2021-07-09 17:55:24,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:55:24,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:55:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:24,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:24,744 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:55:24,744 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 29 treesize of output 57 [2021-07-09 17:55:24,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:24,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:24,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:24,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-09 17:55:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:24,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150729969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:24,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:24,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:55:24,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377956482] [2021-07-09 17:55:24,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:55:24,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:55:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:55:24,936 INFO L87 Difference]: Start difference. First operand 7222 states and 31606 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:26,561 INFO L93 Difference]: Finished difference Result 8363 states and 36081 transitions. [2021-07-09 17:55:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:55:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:26,585 INFO L225 Difference]: With dead ends: 8363 [2021-07-09 17:55:26,585 INFO L226 Difference]: Without dead ends: 8327 [2021-07-09 17:55:26,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1291.8ms TimeCoverageRelationStatistics Valid=328, Invalid=2428, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:55:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-07-09 17:55:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 7367. [2021-07-09 17:55:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7367 states, 7366 states have (on average 4.384469182731469) internal successors, (32296), 7366 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 32296 transitions. [2021-07-09 17:55:26,732 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 32296 transitions. Word has length 33 [2021-07-09 17:55:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:26,732 INFO L482 AbstractCegarLoop]: Abstraction has 7367 states and 32296 transitions. [2021-07-09 17:55:26,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 32296 transitions. [2021-07-09 17:55:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:26,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:26,746 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, 1, 1, 1] [2021-07-09 17:55:26,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:26,947 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -592498626, now seen corresponding path program 88 times [2021-07-09 17:55:26,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:26,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723887383] [2021-07-09 17:55:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:27,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:27,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723887383] [2021-07-09 17:55:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723887383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:27,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789193285] [2021-07-09 17:55:27,109 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 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 [2021-07-09 17:55:27,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:27,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:27,275 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 [2021-07-09 17:55:27,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:27,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:27,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:27,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:55:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:27,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789193285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:27,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:27,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:55:27,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080815751] [2021-07-09 17:55:27,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:27,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:27,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:27,367 INFO L87 Difference]: Start difference. First operand 7367 states and 32296 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:28,859 INFO L93 Difference]: Finished difference Result 8492 states and 36675 transitions. [2021-07-09 17:55:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:55:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:28,885 INFO L225 Difference]: With dead ends: 8492 [2021-07-09 17:55:28,886 INFO L226 Difference]: Without dead ends: 8454 [2021-07-09 17:55:28,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1195.4ms TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:55:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2021-07-09 17:55:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 7370. [2021-07-09 17:55:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7370 states, 7369 states have (on average 4.384041253901479) internal successors, (32306), 7369 states have internal predecessors, (32306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7370 states to 7370 states and 32306 transitions. [2021-07-09 17:55:29,040 INFO L78 Accepts]: Start accepts. Automaton has 7370 states and 32306 transitions. Word has length 33 [2021-07-09 17:55:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:29,041 INFO L482 AbstractCegarLoop]: Abstraction has 7370 states and 32306 transitions. [2021-07-09 17:55:29,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7370 states and 32306 transitions. [2021-07-09 17:55:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:29,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:29,056 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, 1, 1, 1] [2021-07-09 17:55:29,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:29,257 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:29,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1527321056, now seen corresponding path program 89 times [2021-07-09 17:55:29,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:29,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594297593] [2021-07-09 17:55:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:29,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:29,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594297593] [2021-07-09 17:55:29,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594297593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442069301] [2021-07-09 17:55:29,405 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 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 [2021-07-09 17:55:29,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:55:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:29,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:29,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:29,556 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 29 treesize of output 13 [2021-07-09 17:55:29,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:29,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:29,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:29,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:55:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442069301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:29,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:29,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:55:29,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867290202] [2021-07-09 17:55:29,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:29,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:29,650 INFO L87 Difference]: Start difference. First operand 7370 states and 32306 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:30,823 INFO L93 Difference]: Finished difference Result 8292 states and 35787 transitions. [2021-07-09 17:55:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:55:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:30,849 INFO L225 Difference]: With dead ends: 8292 [2021-07-09 17:55:30,849 INFO L226 Difference]: Without dead ends: 8270 [2021-07-09 17:55:30,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2021-07-09 17:55:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 7358. [2021-07-09 17:55:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 7357 states have (on average 4.384939513388609) internal successors, (32260), 7357 states have internal predecessors, (32260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 32260 transitions. [2021-07-09 17:55:30,995 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 32260 transitions. Word has length 33 [2021-07-09 17:55:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:30,995 INFO L482 AbstractCegarLoop]: Abstraction has 7358 states and 32260 transitions. [2021-07-09 17:55:30,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 32260 transitions. [2021-07-09 17:55:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:31,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:31,009 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, 1, 1, 1] [2021-07-09 17:55:31,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-09 17:55:31,209 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:31,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1429633532, now seen corresponding path program 90 times [2021-07-09 17:55:31,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:31,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306183470] [2021-07-09 17:55:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:31,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:31,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306183470] [2021-07-09 17:55:31,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306183470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:31,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887915186] [2021-07-09 17:55:31,358 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 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 [2021-07-09 17:55:31,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:55:31,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:31,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:31,544 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:55:31,544 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 29 treesize of output 57 [2021-07-09 17:55:31,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:31,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:31,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:31,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-09 17:55:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:31,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887915186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:31,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:31,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:55:31,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914583588] [2021-07-09 17:55:31,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:31,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:31,715 INFO L87 Difference]: Start difference. First operand 7358 states and 32260 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:33,135 INFO L93 Difference]: Finished difference Result 8169 states and 35434 transitions. [2021-07-09 17:55:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:55:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:33,159 INFO L225 Difference]: With dead ends: 8169 [2021-07-09 17:55:33,159 INFO L226 Difference]: Without dead ends: 8151 [2021-07-09 17:55:33,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1151.7ms TimeCoverageRelationStatistics Valid=370, Invalid=2180, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:55:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-07-09 17:55:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 7388. [2021-07-09 17:55:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7388 states, 7387 states have (on average 4.385948287532151) internal successors, (32399), 7387 states have internal predecessors, (32399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7388 states to 7388 states and 32399 transitions. [2021-07-09 17:55:33,306 INFO L78 Accepts]: Start accepts. Automaton has 7388 states and 32399 transitions. Word has length 33 [2021-07-09 17:55:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:33,306 INFO L482 AbstractCegarLoop]: Abstraction has 7388 states and 32399 transitions. [2021-07-09 17:55:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7388 states and 32399 transitions. [2021-07-09 17:55:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:33,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:33,320 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, 1, 1, 1] [2021-07-09 17:55:33,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 17:55:33,521 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash -660602162, now seen corresponding path program 91 times [2021-07-09 17:55:33,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:33,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225083871] [2021-07-09 17:55:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:33,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225083871] [2021-07-09 17:55:33,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225083871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739701159] [2021-07-09 17:55:33,743 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 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 [2021-07-09 17:55:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:33,891 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 29 treesize of output 13 [2021-07-09 17:55:33,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:33,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:33,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:33,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:55:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739701159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:33,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:33,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:33,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195339479] [2021-07-09 17:55:33,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:33,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:33,988 INFO L87 Difference]: Start difference. First operand 7388 states and 32399 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:35,806 INFO L93 Difference]: Finished difference Result 9019 states and 38521 transitions. [2021-07-09 17:55:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:55:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:35,832 INFO L225 Difference]: With dead ends: 9019 [2021-07-09 17:55:35,832 INFO L226 Difference]: Without dead ends: 8973 [2021-07-09 17:55:35,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1577.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:55:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2021-07-09 17:55:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 7590. [2021-07-09 17:55:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7590 states, 7589 states have (on average 4.388193437870602) internal successors, (33302), 7589 states have internal predecessors, (33302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7590 states to 7590 states and 33302 transitions. [2021-07-09 17:55:35,997 INFO L78 Accepts]: Start accepts. Automaton has 7590 states and 33302 transitions. Word has length 33 [2021-07-09 17:55:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:35,997 INFO L482 AbstractCegarLoop]: Abstraction has 7590 states and 33302 transitions. [2021-07-09 17:55:35,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7590 states and 33302 transitions. [2021-07-09 17:55:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:36,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:36,012 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, 1, 1, 1] [2021-07-09 17:55:36,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:36,212 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash 185373390, now seen corresponding path program 92 times [2021-07-09 17:55:36,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:36,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006288423] [2021-07-09 17:55:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:36,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:36,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006288423] [2021-07-09 17:55:36,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006288423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:36,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946063580] [2021-07-09 17:55:36,470 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 [2021-07-09 17:55:36,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:36,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:36,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 17:55:36,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:36,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:36,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:36,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 17:55:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946063580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:36,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:36,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:55:36,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185418005] [2021-07-09 17:55:36,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:36,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:36,829 INFO L87 Difference]: Start difference. First operand 7590 states and 33302 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:36,990 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-09 17:55:37,126 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-07-09 17:55:40,461 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 17:55:40,603 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 17:55:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:40,787 INFO L93 Difference]: Finished difference Result 9839 states and 40785 transitions. [2021-07-09 17:55:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:55:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:40,813 INFO L225 Difference]: With dead ends: 9839 [2021-07-09 17:55:40,813 INFO L226 Difference]: Without dead ends: 9778 [2021-07-09 17:55:40,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3364.4ms TimeCoverageRelationStatistics Valid=766, Invalid=4490, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:55:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-07-09 17:55:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7574. [2021-07-09 17:55:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7574 states, 7573 states have (on average 4.386108543509837) internal successors, (33216), 7573 states have internal predecessors, (33216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7574 states to 7574 states and 33216 transitions. [2021-07-09 17:55:41,033 INFO L78 Accepts]: Start accepts. Automaton has 7574 states and 33216 transitions. Word has length 33 [2021-07-09 17:55:41,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:41,033 INFO L482 AbstractCegarLoop]: Abstraction has 7574 states and 33216 transitions. [2021-07-09 17:55:41,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7574 states and 33216 transitions. [2021-07-09 17:55:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:41,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:41,047 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, 1, 1, 1] [2021-07-09 17:55:41,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 17:55:41,247 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:41,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2046764810, now seen corresponding path program 93 times [2021-07-09 17:55:41,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:41,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553894040] [2021-07-09 17:55:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:41,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:41,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553894040] [2021-07-09 17:55:41,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553894040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:41,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262139194] [2021-07-09 17:55:41,482 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 [2021-07-09 17:55:41,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:55:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:41,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:41,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:55:41,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:41,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:41,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:41,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:55:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:41,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262139194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:41,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:41,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:55:41,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761015315] [2021-07-09 17:55:41,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:55:41,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:55:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:55:41,851 INFO L87 Difference]: Start difference. First operand 7574 states and 33216 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:42,145 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 17:55:42,684 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-09 17:55:43,160 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-09 17:55:44,602 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-09 17:55:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:44,916 INFO L93 Difference]: Finished difference Result 9502 states and 39745 transitions. [2021-07-09 17:55:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:55:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:44,945 INFO L225 Difference]: With dead ends: 9502 [2021-07-09 17:55:44,945 INFO L226 Difference]: Without dead ends: 9444 [2021-07-09 17:55:44,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2657.8ms TimeCoverageRelationStatistics Valid=466, Invalid=3566, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:55:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2021-07-09 17:55:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 7577. [2021-07-09 17:55:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 4.384767687434002) internal successors, (33219), 7576 states have internal predecessors, (33219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 33219 transitions. [2021-07-09 17:55:45,114 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 33219 transitions. Word has length 33 [2021-07-09 17:55:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:45,115 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 33219 transitions. [2021-07-09 17:55:45,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 33219 transitions. [2021-07-09 17:55:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:45,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:45,129 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, 1, 1, 1] [2021-07-09 17:55:45,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 17:55:45,330 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash 37827988, now seen corresponding path program 94 times [2021-07-09 17:55:45,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:45,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660932610] [2021-07-09 17:55:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:45,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660932610] [2021-07-09 17:55:45,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660932610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860626868] [2021-07-09 17:55:45,554 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 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 [2021-07-09 17:55:45,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:55:45,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:45,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:45,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:45,746 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 29 treesize of output 13 [2021-07-09 17:55:45,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:45,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:45,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:45,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:55:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:45,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860626868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:45,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:45,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:55:45,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486247628] [2021-07-09 17:55:45,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:45,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:45,852 INFO L87 Difference]: Start difference. First operand 7577 states and 33219 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:47,492 INFO L93 Difference]: Finished difference Result 9292 states and 38866 transitions. [2021-07-09 17:55:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:55:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:47,519 INFO L225 Difference]: With dead ends: 9292 [2021-07-09 17:55:47,519 INFO L226 Difference]: Without dead ends: 9252 [2021-07-09 17:55:47,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1416.5ms TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-07-09 17:55:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 7572. [2021-07-09 17:55:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7572 states, 7571 states have (on average 4.385153876634527) internal successors, (33200), 7571 states have internal predecessors, (33200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7572 states to 7572 states and 33200 transitions. [2021-07-09 17:55:47,742 INFO L78 Accepts]: Start accepts. Automaton has 7572 states and 33200 transitions. Word has length 33 [2021-07-09 17:55:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:47,742 INFO L482 AbstractCegarLoop]: Abstraction has 7572 states and 33200 transitions. [2021-07-09 17:55:47,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7572 states and 33200 transitions. [2021-07-09 17:55:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:47,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:47,757 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, 1, 1, 1] [2021-07-09 17:55:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-07-09 17:55:47,958 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1603340618, now seen corresponding path program 95 times [2021-07-09 17:55:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272928323] [2021-07-09 17:55:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:48,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272928323] [2021-07-09 17:55:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272928323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572990885] [2021-07-09 17:55:48,178 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 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 [2021-07-09 17:55:48,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:55:48,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:48,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:48,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:55:48,327 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 29 treesize of output 13 [2021-07-09 17:55:48,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:48,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:48,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:48,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:55:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572990885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:48,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:48,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:55:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373290880] [2021-07-09 17:55:48,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:48,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:48,421 INFO L87 Difference]: Start difference. First operand 7572 states and 33200 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:50,585 INFO L93 Difference]: Finished difference Result 9207 states and 39437 transitions. [2021-07-09 17:55:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:55:50,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:50,612 INFO L225 Difference]: With dead ends: 9207 [2021-07-09 17:55:50,612 INFO L226 Difference]: Without dead ends: 9152 [2021-07-09 17:55:50,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1822.1ms TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:55:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-07-09 17:55:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 7741. [2021-07-09 17:55:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 4.384625322997416) internal successors, (33937), 7740 states have internal predecessors, (33937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 33937 transitions. [2021-07-09 17:55:50,773 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 33937 transitions. Word has length 33 [2021-07-09 17:55:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:50,773 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 33937 transitions. [2021-07-09 17:55:50,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 33937 transitions. [2021-07-09 17:55:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:50,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:50,788 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, 1, 1, 1] [2021-07-09 17:55:50,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 17:55:50,989 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:50,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1845651126, now seen corresponding path program 96 times [2021-07-09 17:55:50,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:50,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366147853] [2021-07-09 17:55:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:51,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366147853] [2021-07-09 17:55:51,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366147853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:51,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116624863] [2021-07-09 17:55:51,203 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 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 [2021-07-09 17:55:51,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:55:51,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:55:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:51,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:51,356 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 [2021-07-09 17:55:51,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:51,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:51,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:51,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:55:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:51,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116624863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:51,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:51,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:55:51,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412163959] [2021-07-09 17:55:51,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:55:51,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:55:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:55:51,507 INFO L87 Difference]: Start difference. First operand 7741 states and 33937 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:53,870 INFO L93 Difference]: Finished difference Result 9797 states and 40686 transitions. [2021-07-09 17:55:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:55:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:53,897 INFO L225 Difference]: With dead ends: 9797 [2021-07-09 17:55:53,897 INFO L226 Difference]: Without dead ends: 9736 [2021-07-09 17:55:53,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1964.9ms TimeCoverageRelationStatistics Valid=580, Invalid=3202, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:55:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9736 states. [2021-07-09 17:55:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9736 to 7682. [2021-07-09 17:55:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 4.3836740007811485) internal successors, (33671), 7681 states have internal predecessors, (33671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 33671 transitions. [2021-07-09 17:55:54,062 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 33671 transitions. Word has length 33 [2021-07-09 17:55:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:54,062 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 33671 transitions. [2021-07-09 17:55:54,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 33671 transitions. [2021-07-09 17:55:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:54,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:54,077 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, 1, 1, 1] [2021-07-09 17:55:54,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-09 17:55:54,277 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1155064980, now seen corresponding path program 97 times [2021-07-09 17:55:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:54,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735293653] [2021-07-09 17:55:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:54,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:54,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735293653] [2021-07-09 17:55:54,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735293653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:54,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899129079] [2021-07-09 17:55:54,489 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 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 [2021-07-09 17:55:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:54,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:54,636 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 [2021-07-09 17:55:54,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:54,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:54,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:54,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:55:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:54,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899129079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:54,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:54,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:55:54,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923314774] [2021-07-09 17:55:54,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:55:54,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:54,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:55:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:55:54,724 INFO L87 Difference]: Start difference. First operand 7682 states and 33671 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:55,927 INFO L93 Difference]: Finished difference Result 8616 states and 37254 transitions. [2021-07-09 17:55:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:55:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:55,953 INFO L225 Difference]: With dead ends: 8616 [2021-07-09 17:55:55,953 INFO L226 Difference]: Without dead ends: 8534 [2021-07-09 17:55:55,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1022.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:55:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8534 states. [2021-07-09 17:55:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8534 to 7667. [2021-07-09 17:55:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 7666 states have (on average 4.385337855465693) internal successors, (33618), 7666 states have internal predecessors, (33618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 33618 transitions. [2021-07-09 17:55:56,107 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 33618 transitions. Word has length 33 [2021-07-09 17:55:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:56,107 INFO L482 AbstractCegarLoop]: Abstraction has 7667 states and 33618 transitions. [2021-07-09 17:55:56,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 33618 transitions. [2021-07-09 17:55:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:56,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:56,168 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, 1, 1, 1] [2021-07-09 17:55:56,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:56,369 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1025877224, now seen corresponding path program 98 times [2021-07-09 17:55:56,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:56,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134761530] [2021-07-09 17:55:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:56,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:56,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134761530] [2021-07-09 17:55:56,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134761530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:56,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364426846] [2021-07-09 17:55:56,509 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 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 [2021-07-09 17:55:56,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:55:56,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:56,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:56,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:56,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:55:56,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:56,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:56,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:56,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 17:55:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364426846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:56,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:56,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:55:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736470380] [2021-07-09 17:55:56,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:55:56,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:56,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:55:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:55:56,855 INFO L87 Difference]: Start difference. First operand 7667 states and 33618 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:55:58,460 INFO L93 Difference]: Finished difference Result 8621 states and 37208 transitions. [2021-07-09 17:55:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:55:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:55:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:55:58,522 INFO L225 Difference]: With dead ends: 8621 [2021-07-09 17:55:58,522 INFO L226 Difference]: Without dead ends: 8603 [2021-07-09 17:55:58,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1219.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:55:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8603 states. [2021-07-09 17:55:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8603 to 7667. [2021-07-09 17:55:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 7666 states have (on average 4.384424732585442) internal successors, (33611), 7666 states have internal predecessors, (33611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 33611 transitions. [2021-07-09 17:55:58,667 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 33611 transitions. Word has length 33 [2021-07-09 17:55:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:55:58,667 INFO L482 AbstractCegarLoop]: Abstraction has 7667 states and 33611 transitions. [2021-07-09 17:55:58,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 33611 transitions. [2021-07-09 17:55:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:55:58,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:55:58,683 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, 1, 1, 1] [2021-07-09 17:55:58,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:55:58,883 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:55:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:55:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash -256845854, now seen corresponding path program 99 times [2021-07-09 17:55:58,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:55:58,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342426661] [2021-07-09 17:55:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:55:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:55:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:59,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:55:59,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342426661] [2021-07-09 17:55:59,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342426661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:59,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633245726] [2021-07-09 17:55:59,097 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 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 [2021-07-09 17:55:59,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:55:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:55:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:55:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:55:59,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:59,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-09 17:55:59,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:55:59,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:55:59,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:55:59,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-09 17:55:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:55:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633245726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:55:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:55:59,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:55:59,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643896226] [2021-07-09 17:55:59,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:55:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:55:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:55:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:55:59,484 INFO L87 Difference]: Start difference. First operand 7667 states and 33611 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:55:59,769 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-07-09 17:56:02,571 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-09 17:56:02,979 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-09 17:56:03,142 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-09 17:56:03,289 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-07-09 17:56:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:03,765 INFO L93 Difference]: Finished difference Result 9336 states and 39712 transitions. [2021-07-09 17:56:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 17:56:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:03,792 INFO L225 Difference]: With dead ends: 9336 [2021-07-09 17:56:03,792 INFO L226 Difference]: Without dead ends: 9290 [2021-07-09 17:56:03,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3600.8ms TimeCoverageRelationStatistics Valid=711, Invalid=4545, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:56:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-07-09 17:56:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 7730. [2021-07-09 17:56:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 4.3919006339759346) internal successors, (33945), 7729 states have internal predecessors, (33945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 33945 transitions. [2021-07-09 17:56:03,957 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 33945 transitions. Word has length 33 [2021-07-09 17:56:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:03,957 INFO L482 AbstractCegarLoop]: Abstraction has 7730 states and 33945 transitions. [2021-07-09 17:56:03,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 33945 transitions. [2021-07-09 17:56:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:03,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:03,973 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, 1, 1, 1] [2021-07-09 17:56:04,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:04,173 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 589129698, now seen corresponding path program 100 times [2021-07-09 17:56:04,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:04,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152203238] [2021-07-09 17:56:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:04,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152203238] [2021-07-09 17:56:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152203238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211420299] [2021-07-09 17:56:04,375 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 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 [2021-07-09 17:56:04,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:04,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:04,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:04,541 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 28 treesize of output 12 [2021-07-09 17:56:04,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:04,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:04,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:04,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:56:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:04,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211420299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:04,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:04,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:56:04,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216785270] [2021-07-09 17:56:04,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:04,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:04,613 INFO L87 Difference]: Start difference. First operand 7730 states and 33945 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:07,943 INFO L93 Difference]: Finished difference Result 10667 states and 43851 transitions. [2021-07-09 17:56:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:56:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:07,972 INFO L225 Difference]: With dead ends: 10667 [2021-07-09 17:56:07,973 INFO L226 Difference]: Without dead ends: 10547 [2021-07-09 17:56:07,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2782.1ms TimeCoverageRelationStatistics Valid=795, Invalid=4461, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:56:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10547 states. [2021-07-09 17:56:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10547 to 7726. [2021-07-09 17:56:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7725 states have (on average 4.386407766990291) internal successors, (33885), 7725 states have internal predecessors, (33885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 33885 transitions. [2021-07-09 17:56:08,172 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 33885 transitions. Word has length 33 [2021-07-09 17:56:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:08,172 INFO L482 AbstractCegarLoop]: Abstraction has 7726 states and 33885 transitions. [2021-07-09 17:56:08,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 33885 transitions. [2021-07-09 17:56:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:08,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:08,187 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, 1, 1, 1] [2021-07-09 17:56:08,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 17:56:08,389 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1076346498, now seen corresponding path program 101 times [2021-07-09 17:56:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:08,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178886995] [2021-07-09 17:56:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:08,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:08,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178886995] [2021-07-09 17:56:08,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178886995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791484111] [2021-07-09 17:56:08,529 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 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 [2021-07-09 17:56:08,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:56:08,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:08,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:08,694 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 28 treesize of output 12 [2021-07-09 17:56:08,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:08,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:08,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:08,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:56:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791484111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:08,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:08,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:56:08,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719219097] [2021-07-09 17:56:08,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:08,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:08,769 INFO L87 Difference]: Start difference. First operand 7726 states and 33885 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:09,797 INFO L93 Difference]: Finished difference Result 8767 states and 37810 transitions. [2021-07-09 17:56:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:56:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:09,824 INFO L225 Difference]: With dead ends: 8767 [2021-07-09 17:56:09,824 INFO L226 Difference]: Without dead ends: 8729 [2021-07-09 17:56:09,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:56:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8729 states. [2021-07-09 17:56:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8729 to 7718. [2021-07-09 17:56:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7718 states, 7717 states have (on average 4.386030841000388) internal successors, (33847), 7717 states have internal predecessors, (33847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7718 states to 7718 states and 33847 transitions. [2021-07-09 17:56:10,031 INFO L78 Accepts]: Start accepts. Automaton has 7718 states and 33847 transitions. Word has length 33 [2021-07-09 17:56:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:10,031 INFO L482 AbstractCegarLoop]: Abstraction has 7718 states and 33847 transitions. [2021-07-09 17:56:10,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7718 states and 33847 transitions. [2021-07-09 17:56:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:10,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:10,047 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, 1, 1, 1] [2021-07-09 17:56:10,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-09 17:56:10,247 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1968484332, now seen corresponding path program 102 times [2021-07-09 17:56:10,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:10,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211459806] [2021-07-09 17:56:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:10,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:10,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211459806] [2021-07-09 17:56:10,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211459806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:10,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92560236] [2021-07-09 17:56:10,415 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 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 [2021-07-09 17:56:10,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:56:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:10,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:10,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:10,663 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:56:10,663 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 27 treesize of output 55 [2021-07-09 17:56:10,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:56:10,692 INFO L628 ElimStorePlain]: treesize reduction 65, result has 25.3 percent of original size [2021-07-09 17:56:10,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:10,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:56:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92560236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:10,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:10,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:56:10,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737333426] [2021-07-09 17:56:10,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:56:10,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:56:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:56:10,796 INFO L87 Difference]: Start difference. First operand 7718 states and 33847 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:12,120 INFO L93 Difference]: Finished difference Result 8402 states and 36509 transitions. [2021-07-09 17:56:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:56:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:12,188 INFO L225 Difference]: With dead ends: 8402 [2021-07-09 17:56:12,189 INFO L226 Difference]: Without dead ends: 8351 [2021-07-09 17:56:12,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1138.7ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:56:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-07-09 17:56:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 7705. [2021-07-09 17:56:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7705 states, 7704 states have (on average 4.38785046728972) internal successors, (33804), 7704 states have internal predecessors, (33804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7705 states to 7705 states and 33804 transitions. [2021-07-09 17:56:12,328 INFO L78 Accepts]: Start accepts. Automaton has 7705 states and 33804 transitions. Word has length 33 [2021-07-09 17:56:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:12,328 INFO L482 AbstractCegarLoop]: Abstraction has 7705 states and 33804 transitions. [2021-07-09 17:56:12,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7705 states and 33804 transitions. [2021-07-09 17:56:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:12,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:12,345 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, 1, 1, 1] [2021-07-09 17:56:12,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:12,545 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1061234016, now seen corresponding path program 103 times [2021-07-09 17:56:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:12,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021374308] [2021-07-09 17:56:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:12,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:12,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021374308] [2021-07-09 17:56:12,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021374308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:12,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986870058] [2021-07-09 17:56:12,706 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 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 [2021-07-09 17:56:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:12,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:12,863 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 29 treesize of output 13 [2021-07-09 17:56:12,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:12,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:12,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:12,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:56:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:12,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986870058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:12,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:12,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:56:12,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148636465] [2021-07-09 17:56:12,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:12,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:12,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:12,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:12,951 INFO L87 Difference]: Start difference. First operand 7705 states and 33804 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:14,034 INFO L93 Difference]: Finished difference Result 8712 states and 37551 transitions. [2021-07-09 17:56:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:56:14,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:14,059 INFO L225 Difference]: With dead ends: 8712 [2021-07-09 17:56:14,060 INFO L226 Difference]: Without dead ends: 8684 [2021-07-09 17:56:14,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 840.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:56:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-07-09 17:56:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7845. [2021-07-09 17:56:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7845 states, 7844 states have (on average 4.386664966853646) internal successors, (34409), 7844 states have internal predecessors, (34409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7845 states to 7845 states and 34409 transitions. [2021-07-09 17:56:14,265 INFO L78 Accepts]: Start accepts. Automaton has 7845 states and 34409 transitions. Word has length 33 [2021-07-09 17:56:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:14,266 INFO L482 AbstractCegarLoop]: Abstraction has 7845 states and 34409 transitions. [2021-07-09 17:56:14,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7845 states and 34409 transitions. [2021-07-09 17:56:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:14,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:14,281 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, 1, 1, 1] [2021-07-09 17:56:14,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-09 17:56:14,482 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1830265386, now seen corresponding path program 104 times [2021-07-09 17:56:14,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:14,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553402389] [2021-07-09 17:56:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:14,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553402389] [2021-07-09 17:56:14,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553402389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:14,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412202126] [2021-07-09 17:56:14,696 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 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 [2021-07-09 17:56:14,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:14,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:14,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:14,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:14,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:14,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:56:14,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:14,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:14,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:14,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:56:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:15,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412202126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:15,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:15,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:56:15,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606529680] [2021-07-09 17:56:15,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:56:15,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:56:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:56:15,088 INFO L87 Difference]: Start difference. First operand 7845 states and 34409 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:15,230 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 17:56:15,419 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-07-09 17:56:16,852 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-09 17:56:18,447 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-07-09 17:56:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:19,225 INFO L93 Difference]: Finished difference Result 9616 states and 40927 transitions. [2021-07-09 17:56:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 17:56:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:19,255 INFO L225 Difference]: With dead ends: 9616 [2021-07-09 17:56:19,255 INFO L226 Difference]: Without dead ends: 9570 [2021-07-09 17:56:19,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 3647.8ms TimeCoverageRelationStatistics Valid=613, Invalid=4217, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:56:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9570 states. [2021-07-09 17:56:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9570 to 7845. [2021-07-09 17:56:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7845 states, 7844 states have (on average 4.386664966853646) internal successors, (34409), 7844 states have internal predecessors, (34409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7845 states to 7845 states and 34409 transitions. [2021-07-09 17:56:19,428 INFO L78 Accepts]: Start accepts. Automaton has 7845 states and 34409 transitions. Word has length 33 [2021-07-09 17:56:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:19,428 INFO L482 AbstractCegarLoop]: Abstraction has 7845 states and 34409 transitions. [2021-07-09 17:56:19,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7845 states and 34409 transitions. [2021-07-09 17:56:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:19,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:19,444 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, 1, 1, 1] [2021-07-09 17:56:19,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:19,645 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 49667084, now seen corresponding path program 105 times [2021-07-09 17:56:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826985327] [2021-07-09 17:56:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:19,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826985327] [2021-07-09 17:56:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826985327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006743097] [2021-07-09 17:56:19,857 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 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 [2021-07-09 17:56:19,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:56:19,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:19,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:56:19,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:20,052 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:56:20,052 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-09 17:56:20,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:20,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:20,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:20,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-09 17:56:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:20,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006743097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:20,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:20,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:56:20,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953487446] [2021-07-09 17:56:20,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:20,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:20,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:20,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:20,238 INFO L87 Difference]: Start difference. First operand 7845 states and 34409 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:22,364 INFO L93 Difference]: Finished difference Result 8881 states and 38180 transitions. [2021-07-09 17:56:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:56:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:22,391 INFO L225 Difference]: With dead ends: 8881 [2021-07-09 17:56:22,391 INFO L226 Difference]: Without dead ends: 8822 [2021-07-09 17:56:22,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1656.3ms TimeCoverageRelationStatistics Valid=417, Invalid=2663, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:56:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2021-07-09 17:56:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 7909. [2021-07-09 17:56:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7909 states, 7908 states have (on average 4.387961557916034) internal successors, (34700), 7908 states have internal predecessors, (34700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7909 states to 7909 states and 34700 transitions. [2021-07-09 17:56:22,575 INFO L78 Accepts]: Start accepts. Automaton has 7909 states and 34700 transitions. Word has length 33 [2021-07-09 17:56:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:22,575 INFO L482 AbstractCegarLoop]: Abstraction has 7909 states and 34700 transitions. [2021-07-09 17:56:22,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7909 states and 34700 transitions. [2021-07-09 17:56:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:22,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:22,592 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, 1, 1, 1] [2021-07-09 17:56:22,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:22,792 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash 444102738, now seen corresponding path program 106 times [2021-07-09 17:56:22,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:22,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351266476] [2021-07-09 17:56:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:22,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:22,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351266476] [2021-07-09 17:56:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351266476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:22,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803973188] [2021-07-09 17:56:22,998 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 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 [2021-07-09 17:56:23,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:23,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:23,161 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 29 treesize of output 13 [2021-07-09 17:56:23,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:23,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:23,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:23,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:56:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:23,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803973188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:23,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:23,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:23,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553483268] [2021-07-09 17:56:23,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:56:23,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:56:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:56:23,328 INFO L87 Difference]: Start difference. First operand 7909 states and 34700 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:25,307 INFO L93 Difference]: Finished difference Result 9483 states and 40098 transitions. [2021-07-09 17:56:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:56:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:25,336 INFO L225 Difference]: With dead ends: 9483 [2021-07-09 17:56:25,337 INFO L226 Difference]: Without dead ends: 9454 [2021-07-09 17:56:25,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1578.5ms TimeCoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:56:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9454 states. [2021-07-09 17:56:25,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9454 to 7909. [2021-07-09 17:56:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7909 states, 7908 states have (on average 4.387961557916034) internal successors, (34700), 7908 states have internal predecessors, (34700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7909 states to 7909 states and 34700 transitions. [2021-07-09 17:56:25,542 INFO L78 Accepts]: Start accepts. Automaton has 7909 states and 34700 transitions. Word has length 33 [2021-07-09 17:56:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:25,542 INFO L482 AbstractCegarLoop]: Abstraction has 7909 states and 34700 transitions. [2021-07-09 17:56:25,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7909 states and 34700 transitions. [2021-07-09 17:56:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:25,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:25,558 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, 1, 1, 1] [2021-07-09 17:56:25,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-09 17:56:25,759 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash 90963248, now seen corresponding path program 107 times [2021-07-09 17:56:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:25,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095988353] [2021-07-09 17:56:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:25,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:25,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095988353] [2021-07-09 17:56:25,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095988353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:25,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597729844] [2021-07-09 17:56:25,983 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 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 [2021-07-09 17:56:26,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:56:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:56:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:26,145 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 27 treesize of output 13 [2021-07-09 17:56:26,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:26,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:26,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:26,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:18 [2021-07-09 17:56:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:26,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597729844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:26,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:26,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:56:26,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156367370] [2021-07-09 17:56:26,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:56:26,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:56:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:56:26,272 INFO L87 Difference]: Start difference. First operand 7909 states and 34700 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:28,354 INFO L93 Difference]: Finished difference Result 8859 states and 38382 transitions. [2021-07-09 17:56:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:56:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:28,381 INFO L225 Difference]: With dead ends: 8859 [2021-07-09 17:56:28,382 INFO L226 Difference]: Without dead ends: 8793 [2021-07-09 17:56:28,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1731.3ms TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:56:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2021-07-09 17:56:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 7900. [2021-07-09 17:56:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 4.388656791998987) internal successors, (34666), 7899 states have internal predecessors, (34666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 34666 transitions. [2021-07-09 17:56:28,540 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 34666 transitions. Word has length 33 [2021-07-09 17:56:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:28,540 INFO L482 AbstractCegarLoop]: Abstraction has 7900 states and 34666 transitions. [2021-07-09 17:56:28,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 34666 transitions. [2021-07-09 17:56:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:28,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:28,556 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, 1, 1, 1] [2021-07-09 17:56:28,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:28,756 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -200759130, now seen corresponding path program 108 times [2021-07-09 17:56:28,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:28,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121314549] [2021-07-09 17:56:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:28,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:28,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121314549] [2021-07-09 17:56:28,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121314549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:28,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675832894] [2021-07-09 17:56:28,970 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 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 [2021-07-09 17:56:29,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:56:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:56:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:29,173 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:56:29,174 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 29 treesize of output 57 [2021-07-09 17:56:29,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:29,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:29,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:29,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 17:56:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:29,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675832894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:29,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:29,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:56:29,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613190383] [2021-07-09 17:56:29,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:29,387 INFO L87 Difference]: Start difference. First operand 7900 states and 34666 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:31,749 INFO L93 Difference]: Finished difference Result 8775 states and 37916 transitions. [2021-07-09 17:56:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:56:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:31,775 INFO L225 Difference]: With dead ends: 8775 [2021-07-09 17:56:31,775 INFO L226 Difference]: Without dead ends: 8729 [2021-07-09 17:56:31,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1898.0ms TimeCoverageRelationStatistics Valid=401, Invalid=2791, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:56:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8729 states. [2021-07-09 17:56:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8729 to 7958. [2021-07-09 17:56:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 4.392861631268066) internal successors, (34954), 7957 states have internal predecessors, (34954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 34954 transitions. [2021-07-09 17:56:31,942 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 34954 transitions. Word has length 33 [2021-07-09 17:56:31,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:31,942 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 34954 transitions. [2021-07-09 17:56:31,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 34954 transitions. [2021-07-09 17:56:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:31,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:31,957 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, 1, 1, 1] [2021-07-09 17:56:32,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-07-09 17:56:32,158 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1981357432, now seen corresponding path program 109 times [2021-07-09 17:56:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:32,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088811410] [2021-07-09 17:56:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:32,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:32,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088811410] [2021-07-09 17:56:32,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088811410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:32,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092030079] [2021-07-09 17:56:32,418 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 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 [2021-07-09 17:56:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:32,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:32,571 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 29 treesize of output 13 [2021-07-09 17:56:32,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:32,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:32,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:32,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:56:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092030079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:32,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:32,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:32,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927810990] [2021-07-09 17:56:32,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:56:32,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:56:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:56:32,667 INFO L87 Difference]: Start difference. First operand 7958 states and 34954 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:34,595 INFO L93 Difference]: Finished difference Result 9067 states and 39098 transitions. [2021-07-09 17:56:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:56:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:34,622 INFO L225 Difference]: With dead ends: 9067 [2021-07-09 17:56:34,623 INFO L226 Difference]: Without dead ends: 9040 [2021-07-09 17:56:34,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1632.2ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:56:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9040 states. [2021-07-09 17:56:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9040 to 7949. [2021-07-09 17:56:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7949 states, 7948 states have (on average 4.393432310015098) internal successors, (34919), 7948 states have internal predecessors, (34919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7949 states to 7949 states and 34919 transitions. [2021-07-09 17:56:34,782 INFO L78 Accepts]: Start accepts. Automaton has 7949 states and 34919 transitions. Word has length 33 [2021-07-09 17:56:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:34,782 INFO L482 AbstractCegarLoop]: Abstraction has 7949 states and 34919 transitions. [2021-07-09 17:56:34,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7949 states and 34919 transitions. [2021-07-09 17:56:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:34,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:34,797 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, 1, 1, 1] [2021-07-09 17:56:34,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:34,998 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:34,998 INFO L82 PathProgramCache]: Analyzing trace with hash 645216422, now seen corresponding path program 110 times [2021-07-09 17:56:34,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:34,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120085748] [2021-07-09 17:56:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:35,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:35,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120085748] [2021-07-09 17:56:35,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120085748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:35,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590582557] [2021-07-09 17:56:35,212 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 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 [2021-07-09 17:56:35,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:35,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:35,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:56:35,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:35,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:35,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:35,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:56:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590582557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:56:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208164294] [2021-07-09 17:56:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:56:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:56:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:56:35,575 INFO L87 Difference]: Start difference. First operand 7949 states and 34919 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:35,854 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-07-09 17:56:37,053 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-09 17:56:39,100 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-07-09 17:56:39,489 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 17:56:39,632 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-09 17:56:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:39,808 INFO L93 Difference]: Finished difference Result 10534 states and 43766 transitions. [2021-07-09 17:56:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 17:56:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:39,836 INFO L225 Difference]: With dead ends: 10534 [2021-07-09 17:56:39,836 INFO L226 Difference]: Without dead ends: 10465 [2021-07-09 17:56:39,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 3493.6ms TimeCoverageRelationStatistics Valid=777, Invalid=5385, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 17:56:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10465 states. [2021-07-09 17:56:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10465 to 7942. [2021-07-09 17:56:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 4.390882760357638) internal successors, (34868), 7941 states have internal predecessors, (34868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 34868 transitions. [2021-07-09 17:56:40,002 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 34868 transitions. Word has length 33 [2021-07-09 17:56:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:40,002 INFO L482 AbstractCegarLoop]: Abstraction has 7942 states and 34868 transitions. [2021-07-09 17:56:40,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 34868 transitions. [2021-07-09 17:56:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:40,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:40,017 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, 1, 1, 1] [2021-07-09 17:56:40,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-09 17:56:40,218 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash -649034768, now seen corresponding path program 111 times [2021-07-09 17:56:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:40,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569604830] [2021-07-09 17:56:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:40,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569604830] [2021-07-09 17:56:40,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569604830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:40,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575022334] [2021-07-09 17:56:40,381 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 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 [2021-07-09 17:56:40,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:56:40,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:40,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:40,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:56:40,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:40,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:40,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:40,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:56:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:40,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575022334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:40,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:40,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:56:40,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421654735] [2021-07-09 17:56:40,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:56:40,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:40,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:56:40,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:56:40,749 INFO L87 Difference]: Start difference. First operand 7942 states and 34868 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:40,912 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-07-09 17:56:41,216 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-07-09 17:56:41,541 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-07-09 17:56:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:42,662 INFO L93 Difference]: Finished difference Result 8622 states and 37529 transitions. [2021-07-09 17:56:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:56:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:42,687 INFO L225 Difference]: With dead ends: 8622 [2021-07-09 17:56:42,687 INFO L226 Difference]: Without dead ends: 8591 [2021-07-09 17:56:42,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1668.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:56:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-07-09 17:56:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 7942. [2021-07-09 17:56:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7941 states have (on average 4.390882760357638) internal successors, (34868), 7941 states have internal predecessors, (34868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 34868 transitions. [2021-07-09 17:56:42,843 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 34868 transitions. Word has length 33 [2021-07-09 17:56:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:42,843 INFO L482 AbstractCegarLoop]: Abstraction has 7942 states and 34868 transitions. [2021-07-09 17:56:42,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 34868 transitions. [2021-07-09 17:56:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:42,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:42,858 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, 1, 1, 1] [2021-07-09 17:56:43,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 17:56:43,059 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1606314080, now seen corresponding path program 112 times [2021-07-09 17:56:43,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:43,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931377752] [2021-07-09 17:56:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:43,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931377752] [2021-07-09 17:56:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931377752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796750743] [2021-07-09 17:56:43,244 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 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 [2021-07-09 17:56:43,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:43,445 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 [2021-07-09 17:56:43,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:43,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:43,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:43,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:56:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:43,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796750743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:43,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:43,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:56:43,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860993155] [2021-07-09 17:56:43,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:43,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:43,534 INFO L87 Difference]: Start difference. First operand 7942 states and 34868 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:44,537 INFO L93 Difference]: Finished difference Result 8596 states and 37325 transitions. [2021-07-09 17:56:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:56:44,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:44,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:44,563 INFO L225 Difference]: With dead ends: 8596 [2021-07-09 17:56:44,564 INFO L226 Difference]: Without dead ends: 8556 [2021-07-09 17:56:44,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:56:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-07-09 17:56:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 7930. [2021-07-09 17:56:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7929 states have (on average 4.392483289191575) internal successors, (34828), 7929 states have internal predecessors, (34828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 34828 transitions. [2021-07-09 17:56:44,732 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 34828 transitions. Word has length 33 [2021-07-09 17:56:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:44,733 INFO L482 AbstractCegarLoop]: Abstraction has 7930 states and 34828 transitions. [2021-07-09 17:56:44,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 34828 transitions. [2021-07-09 17:56:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:44,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:44,748 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, 1, 1, 1] [2021-07-09 17:56:44,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:44,949 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1464990324, now seen corresponding path program 113 times [2021-07-09 17:56:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:44,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463683265] [2021-07-09 17:56:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:45,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:45,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463683265] [2021-07-09 17:56:45,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463683265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:45,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480421558] [2021-07-09 17:56:45,100 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 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 [2021-07-09 17:56:45,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:56:45,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:45,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:45,278 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 28 treesize of output 12 [2021-07-09 17:56:45,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:45,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:45,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:45,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:56:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:45,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480421558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:45,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:45,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:56:45,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892958126] [2021-07-09 17:56:45,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:56:45,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:56:45,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:56:45,417 INFO L87 Difference]: Start difference. First operand 7930 states and 34828 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:46,509 INFO L93 Difference]: Finished difference Result 9367 states and 40126 transitions. [2021-07-09 17:56:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:56:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:46,536 INFO L225 Difference]: With dead ends: 9367 [2021-07-09 17:56:46,537 INFO L226 Difference]: Without dead ends: 9318 [2021-07-09 17:56:46,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:56:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9318 states. [2021-07-09 17:56:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9318 to 8127. [2021-07-09 17:56:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8127 states, 8126 states have (on average 4.393920748215605) internal successors, (35705), 8126 states have internal predecessors, (35705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 35705 transitions. [2021-07-09 17:56:46,711 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 35705 transitions. Word has length 33 [2021-07-09 17:56:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:46,712 INFO L482 AbstractCegarLoop]: Abstraction has 8127 states and 35705 transitions. [2021-07-09 17:56:46,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 35705 transitions. [2021-07-09 17:56:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:46,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:46,728 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, 1, 1, 1] [2021-07-09 17:56:46,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-09 17:56:46,928 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2060945602, now seen corresponding path program 114 times [2021-07-09 17:56:46,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:46,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163256407] [2021-07-09 17:56:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:47,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163256407] [2021-07-09 17:56:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163256407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:47,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454433750] [2021-07-09 17:56:47,139 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 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 [2021-07-09 17:56:47,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:56:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:47,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:47,409 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:56:47,410 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-07-09 17:56:47,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:56:47,445 INFO L628 ElimStorePlain]: treesize reduction 84, result has 20.8 percent of original size [2021-07-09 17:56:47,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:47,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:56:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:47,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454433750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:47,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:47,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:56:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229388523] [2021-07-09 17:56:47,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:56:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:56:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:56:47,577 INFO L87 Difference]: Start difference. First operand 8127 states and 35705 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:50,105 INFO L93 Difference]: Finished difference Result 9160 states and 39451 transitions. [2021-07-09 17:56:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:56:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:50,133 INFO L225 Difference]: With dead ends: 9160 [2021-07-09 17:56:50,133 INFO L226 Difference]: Without dead ends: 9114 [2021-07-09 17:56:50,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2172.3ms TimeCoverageRelationStatistics Valid=468, Invalid=3438, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:56:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9114 states. [2021-07-09 17:56:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9114 to 8127. [2021-07-09 17:56:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8127 states, 8126 states have (on average 4.393920748215605) internal successors, (35705), 8126 states have internal predecessors, (35705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 35705 transitions. [2021-07-09 17:56:50,307 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 35705 transitions. Word has length 33 [2021-07-09 17:56:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:50,307 INFO L482 AbstractCegarLoop]: Abstraction has 8127 states and 35705 transitions. [2021-07-09 17:56:50,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 35705 transitions. [2021-07-09 17:56:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:50,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:50,324 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, 1, 1, 1] [2021-07-09 17:56:50,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:56:50,526 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash 453423392, now seen corresponding path program 115 times [2021-07-09 17:56:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:50,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896813622] [2021-07-09 17:56:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:50,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:50,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896813622] [2021-07-09 17:56:50,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896813622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:50,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866638350] [2021-07-09 17:56:50,743 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 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 [2021-07-09 17:56:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:50,916 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 [2021-07-09 17:56:50,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:50,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:50,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:50,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:56:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:50,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866638350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:50,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:50,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827783837] [2021-07-09 17:56:50,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:56:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:56:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:56:50,995 INFO L87 Difference]: Start difference. First operand 8127 states and 35705 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:53,345 INFO L93 Difference]: Finished difference Result 9795 states and 41927 transitions. [2021-07-09 17:56:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:56:53,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:53,374 INFO L225 Difference]: With dead ends: 9795 [2021-07-09 17:56:53,374 INFO L226 Difference]: Without dead ends: 9700 [2021-07-09 17:56:53,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1863.6ms TimeCoverageRelationStatistics Valid=570, Invalid=3590, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 17:56:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9700 states. [2021-07-09 17:56:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9700 to 8026. [2021-07-09 17:56:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 8025 states have (on average 4.3966355140186915) internal successors, (35283), 8025 states have internal predecessors, (35283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 35283 transitions. [2021-07-09 17:56:53,546 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 35283 transitions. Word has length 33 [2021-07-09 17:56:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:53,547 INFO L482 AbstractCegarLoop]: Abstraction has 8026 states and 35283 transitions. [2021-07-09 17:56:53,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 35283 transitions. [2021-07-09 17:56:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:53,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:53,563 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, 1, 1, 1] [2021-07-09 17:56:53,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-07-09 17:56:53,765 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash 522383216, now seen corresponding path program 116 times [2021-07-09 17:56:53,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:53,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894751022] [2021-07-09 17:56:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:53,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894751022] [2021-07-09 17:56:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894751022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498458003] [2021-07-09 17:56:53,925 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 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 [2021-07-09 17:56:53,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:56:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:53,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:54,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:54,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:56:54,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:54,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:54,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:54,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 17:56:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:54,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498458003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:54,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:54,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:56:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60435470] [2021-07-09 17:56:54,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:56:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:56:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:56:54,380 INFO L87 Difference]: Start difference. First operand 8026 states and 35283 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:56,099 INFO L93 Difference]: Finished difference Result 8972 states and 39173 transitions. [2021-07-09 17:56:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:56:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:56,126 INFO L225 Difference]: With dead ends: 8972 [2021-07-09 17:56:56,126 INFO L226 Difference]: Without dead ends: 8921 [2021-07-09 17:56:56,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1380.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:56:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8921 states. [2021-07-09 17:56:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8921 to 8008. [2021-07-09 17:56:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 4.39865118021731) internal successors, (35220), 8007 states have internal predecessors, (35220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 35220 transitions. [2021-07-09 17:56:56,354 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 35220 transitions. Word has length 33 [2021-07-09 17:56:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:56,354 INFO L482 AbstractCegarLoop]: Abstraction has 8008 states and 35220 transitions. [2021-07-09 17:56:56,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 35220 transitions. [2021-07-09 17:56:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:56,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:56,372 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, 1, 1, 1] [2021-07-09 17:56:56,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-09 17:56:56,573 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:56,573 INFO L82 PathProgramCache]: Analyzing trace with hash -518815942, now seen corresponding path program 117 times [2021-07-09 17:56:56,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:56,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770661618] [2021-07-09 17:56:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:56,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770661618] [2021-07-09 17:56:56,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770661618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997244607] [2021-07-09 17:56:56,743 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 [2021-07-09 17:56:56,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:56:56,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:56,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:56,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:56,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-09 17:56:56,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:56,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:56,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:56,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-09 17:56:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997244607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:57,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:57,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:56:57,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181634558] [2021-07-09 17:56:57,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:56:57,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:56:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:56:57,128 INFO L87 Difference]: Start difference. First operand 8008 states and 35220 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:56:58,665 INFO L93 Difference]: Finished difference Result 8710 states and 37808 transitions. [2021-07-09 17:56:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:56:58,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:56:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:56:58,690 INFO L225 Difference]: With dead ends: 8710 [2021-07-09 17:56:58,690 INFO L226 Difference]: Without dead ends: 8692 [2021-07-09 17:56:58,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1220.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:56:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2021-07-09 17:56:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 8001. [2021-07-09 17:56:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8001 states, 8000 states have (on average 4.400125) internal successors, (35201), 8000 states have internal predecessors, (35201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8001 states to 8001 states and 35201 transitions. [2021-07-09 17:56:58,894 INFO L78 Accepts]: Start accepts. Automaton has 8001 states and 35201 transitions. Word has length 33 [2021-07-09 17:56:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:56:58,894 INFO L482 AbstractCegarLoop]: Abstraction has 8001 states and 35201 transitions. [2021-07-09 17:56:58,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:56:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8001 states and 35201 transitions. [2021-07-09 17:56:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:56:58,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:56:58,910 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, 1, 1, 1] [2021-07-09 17:56:59,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-09 17:56:59,111 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:56:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:56:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash 250215428, now seen corresponding path program 118 times [2021-07-09 17:56:59,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:56:59,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862488791] [2021-07-09 17:56:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:56:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:56:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:59,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:56:59,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862488791] [2021-07-09 17:56:59,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862488791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:59,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622301298] [2021-07-09 17:56:59,319 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 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 [2021-07-09 17:56:59,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:56:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:56:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:56:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:56:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:56:59,499 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 28 treesize of output 12 [2021-07-09 17:56:59,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:56:59,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:56:59,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:56:59,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:56:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:56:59,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622301298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:56:59,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:56:59,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:56:59,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549856440] [2021-07-09 17:56:59,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:56:59,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:56:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:56:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:56:59,593 INFO L87 Difference]: Start difference. First operand 8001 states and 35201 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:02,847 INFO L93 Difference]: Finished difference Result 9546 states and 41268 transitions. [2021-07-09 17:57:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:57:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:02,876 INFO L225 Difference]: With dead ends: 9546 [2021-07-09 17:57:02,877 INFO L226 Difference]: Without dead ends: 9514 [2021-07-09 17:57:02,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2681.2ms TimeCoverageRelationStatistics Valid=658, Invalid=4312, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:57:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9514 states. [2021-07-09 17:57:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9514 to 8001. [2021-07-09 17:57:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8001 states, 8000 states have (on average 4.400125) internal successors, (35201), 8000 states have internal predecessors, (35201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8001 states to 8001 states and 35201 transitions. [2021-07-09 17:57:03,045 INFO L78 Accepts]: Start accepts. Automaton has 8001 states and 35201 transitions. Word has length 33 [2021-07-09 17:57:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:03,045 INFO L482 AbstractCegarLoop]: Abstraction has 8001 states and 35201 transitions. [2021-07-09 17:57:03,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8001 states and 35201 transitions. [2021-07-09 17:57:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:03,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:03,061 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, 1, 1, 1] [2021-07-09 17:57:03,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-07-09 17:57:03,261 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:03,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:03,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1096190980, now seen corresponding path program 119 times [2021-07-09 17:57:03,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:03,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198869806] [2021-07-09 17:57:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:03,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198869806] [2021-07-09 17:57:03,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198869806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:03,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088201510] [2021-07-09 17:57:03,459 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 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 [2021-07-09 17:57:03,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:57:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:03,627 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 [2021-07-09 17:57:03,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:03,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:03,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:03,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:57:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:03,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088201510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:03,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:03,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:57:03,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292109864] [2021-07-09 17:57:03,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:03,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:03,700 INFO L87 Difference]: Start difference. First operand 8001 states and 35201 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:07,058 INFO L93 Difference]: Finished difference Result 10320 states and 43112 transitions. [2021-07-09 17:57:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:57:07,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:07,086 INFO L225 Difference]: With dead ends: 10320 [2021-07-09 17:57:07,086 INFO L226 Difference]: Without dead ends: 10190 [2021-07-09 17:57:07,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 2794.8ms TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:57:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-07-09 17:57:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 7931. [2021-07-09 17:57:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 4.400252206809584) internal successors, (34894), 7930 states have internal predecessors, (34894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 34894 transitions. [2021-07-09 17:57:07,283 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 34894 transitions. Word has length 33 [2021-07-09 17:57:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:07,283 INFO L482 AbstractCegarLoop]: Abstraction has 7931 states and 34894 transitions. [2021-07-09 17:57:07,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 34894 transitions. [2021-07-09 17:57:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:07,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:07,298 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, 1, 1, 1] [2021-07-09 17:57:07,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:07,498 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:07,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1461423050, now seen corresponding path program 120 times [2021-07-09 17:57:07,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:07,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100737815] [2021-07-09 17:57:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:07,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:07,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100737815] [2021-07-09 17:57:07,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100737815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:07,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037109763] [2021-07-09 17:57:07,657 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 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 [2021-07-09 17:57:07,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:57:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:07,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:07,918 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:57:07,918 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 27 treesize of output 55 [2021-07-09 17:57:07,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:57:07,946 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-09 17:57:07,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:07,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:57:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037109763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:08,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:08,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217232705] [2021-07-09 17:57:08,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:08,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:08,055 INFO L87 Difference]: Start difference. First operand 7931 states and 34894 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:09,590 INFO L93 Difference]: Finished difference Result 8423 states and 36711 transitions. [2021-07-09 17:57:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:57:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:09,615 INFO L225 Difference]: With dead ends: 8423 [2021-07-09 17:57:09,615 INFO L226 Difference]: Without dead ends: 8372 [2021-07-09 17:57:09,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1200.5ms TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:57:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8372 states. [2021-07-09 17:57:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8372 to 7913. [2021-07-09 17:57:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 7912 states have (on average 4.39989888776542) internal successors, (34812), 7912 states have internal predecessors, (34812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 34812 transitions. [2021-07-09 17:57:09,812 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 34812 transitions. Word has length 33 [2021-07-09 17:57:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:09,812 INFO L482 AbstractCegarLoop]: Abstraction has 7913 states and 34812 transitions. [2021-07-09 17:57:09,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 34812 transitions. [2021-07-09 17:57:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:09,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:09,827 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, 1, 1, 1] [2021-07-09 17:57:10,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-07-09 17:57:10,028 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash 242007776, now seen corresponding path program 121 times [2021-07-09 17:57:10,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:10,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184975834] [2021-07-09 17:57:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184975834] [2021-07-09 17:57:10,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184975834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587266499] [2021-07-09 17:57:10,189 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 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 [2021-07-09 17:57:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:10,386 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 28 treesize of output 12 [2021-07-09 17:57:10,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:10,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:10,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:10,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:57:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587266499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:10,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:57:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113160518] [2021-07-09 17:57:10,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:10,464 INFO L87 Difference]: Start difference. First operand 7913 states and 34812 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:11,904 INFO L93 Difference]: Finished difference Result 8454 states and 36953 transitions. [2021-07-09 17:57:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:57:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:11,927 INFO L225 Difference]: With dead ends: 8454 [2021-07-09 17:57:11,927 INFO L226 Difference]: Without dead ends: 8401 [2021-07-09 17:57:11,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:57:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-07-09 17:57:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 7899. [2021-07-09 17:57:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7899 states, 7898 states have (on average 4.402000506457331) internal successors, (34767), 7898 states have internal predecessors, (34767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 34767 transitions. [2021-07-09 17:57:12,071 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 34767 transitions. Word has length 33 [2021-07-09 17:57:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:12,071 INFO L482 AbstractCegarLoop]: Abstraction has 7899 states and 34767 transitions. [2021-07-09 17:57:12,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 34767 transitions. [2021-07-09 17:57:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:12,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:12,150 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, 1, 1, 1] [2021-07-09 17:57:12,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:12,350 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1010380462, now seen corresponding path program 122 times [2021-07-09 17:57:12,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:12,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635895951] [2021-07-09 17:57:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:12,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635895951] [2021-07-09 17:57:12,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635895951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079897456] [2021-07-09 17:57:12,519 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 [2021-07-09 17:57:12,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:12,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:57:12,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:12,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:57:12,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:12,708 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 24 treesize of output 30 [2021-07-09 17:57:12,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:12,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:12,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:12,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-09 17:57:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079897456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:12,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:57:12,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602707118] [2021-07-09 17:57:12,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:57:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:57:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:57:12,861 INFO L87 Difference]: Start difference. First operand 7899 states and 34767 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:14,016 INFO L93 Difference]: Finished difference Result 8630 states and 37667 transitions. [2021-07-09 17:57:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:57:14,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:14,041 INFO L225 Difference]: With dead ends: 8630 [2021-07-09 17:57:14,042 INFO L226 Difference]: Without dead ends: 8611 [2021-07-09 17:57:14,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 957.4ms TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:57:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2021-07-09 17:57:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 8024. [2021-07-09 17:57:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8024 states, 8023 states have (on average 4.406331796086252) internal successors, (35352), 8023 states have internal predecessors, (35352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8024 states to 8024 states and 35352 transitions. [2021-07-09 17:57:14,202 INFO L78 Accepts]: Start accepts. Automaton has 8024 states and 35352 transitions. Word has length 33 [2021-07-09 17:57:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:14,202 INFO L482 AbstractCegarLoop]: Abstraction has 8024 states and 35352 transitions. [2021-07-09 17:57:14,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8024 states and 35352 transitions. [2021-07-09 17:57:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:14,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:14,217 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, 1, 1, 1] [2021-07-09 17:57:14,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 17:57:14,417 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1981314228, now seen corresponding path program 123 times [2021-07-09 17:57:14,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:14,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164872537] [2021-07-09 17:57:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:14,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:14,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164872537] [2021-07-09 17:57:14,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164872537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646209271] [2021-07-09 17:57:14,587 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 [2021-07-09 17:57:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:57:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:57:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:14,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:14,871 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:57:14,871 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 27 treesize of output 55 [2021-07-09 17:57:14,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:57:14,898 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-09 17:57:14,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:14,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:57:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:15,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646209271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:15,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:15,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:57:15,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229821143] [2021-07-09 17:57:15,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:15,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:15,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:15,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:15,031 INFO L87 Difference]: Start difference. First operand 8024 states and 35352 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:16,476 INFO L93 Difference]: Finished difference Result 8769 states and 38202 transitions. [2021-07-09 17:57:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:57:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:16,502 INFO L225 Difference]: With dead ends: 8769 [2021-07-09 17:57:16,502 INFO L226 Difference]: Without dead ends: 8760 [2021-07-09 17:57:16,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1095.6ms TimeCoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:57:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2021-07-09 17:57:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 8027. [2021-07-09 17:57:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8027 states, 8026 states have (on average 4.405307749813107) internal successors, (35357), 8026 states have internal predecessors, (35357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 35357 transitions. [2021-07-09 17:57:16,665 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 35357 transitions. Word has length 33 [2021-07-09 17:57:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:16,665 INFO L482 AbstractCegarLoop]: Abstraction has 8027 states and 35357 transitions. [2021-07-09 17:57:16,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 35357 transitions. [2021-07-09 17:57:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:16,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:16,680 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, 1, 1, 1] [2021-07-09 17:57:16,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-09 17:57:16,880 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash 645259626, now seen corresponding path program 124 times [2021-07-09 17:57:16,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:16,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213293372] [2021-07-09 17:57:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:17,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:17,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213293372] [2021-07-09 17:57:17,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213293372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:17,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065293111] [2021-07-09 17:57:17,046 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 [2021-07-09 17:57:17,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:17,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:17,231 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 28 treesize of output 12 [2021-07-09 17:57:17,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:17,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:17,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:17,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:57:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:17,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065293111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:17,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:17,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:57:17,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560800978] [2021-07-09 17:57:17,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:17,358 INFO L87 Difference]: Start difference. First operand 8027 states and 35357 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:18,414 INFO L93 Difference]: Finished difference Result 8916 states and 38833 transitions. [2021-07-09 17:57:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:57:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:18,441 INFO L225 Difference]: With dead ends: 8916 [2021-07-09 17:57:18,441 INFO L226 Difference]: Without dead ends: 8902 [2021-07-09 17:57:18,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 811.3ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:57:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8902 states. [2021-07-09 17:57:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8902 to 8026. [2021-07-09 17:57:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 8025 states have (on average 4.405482866043614) internal successors, (35354), 8025 states have internal predecessors, (35354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 35354 transitions. [2021-07-09 17:57:18,616 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 35354 transitions. Word has length 33 [2021-07-09 17:57:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:18,616 INFO L482 AbstractCegarLoop]: Abstraction has 8026 states and 35354 transitions. [2021-07-09 17:57:18,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 35354 transitions. [2021-07-09 17:57:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:18,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:18,632 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, 1, 1, 1] [2021-07-09 17:57:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,832 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1414290996, now seen corresponding path program 125 times [2021-07-09 17:57:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166918957] [2021-07-09 17:57:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:18,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166918957] [2021-07-09 17:57:18,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166918957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372814164] [2021-07-09 17:57:18,999 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 [2021-07-09 17:57:19,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:57:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:19,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:19,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:19,189 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 28 treesize of output 12 [2021-07-09 17:57:19,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:19,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:19,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:19,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:57:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:19,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372814164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:19,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:19,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:57:19,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596907250] [2021-07-09 17:57:19,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:19,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:19,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:19,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:19,269 INFO L87 Difference]: Start difference. First operand 8026 states and 35354 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:20,950 INFO L93 Difference]: Finished difference Result 9228 states and 40173 transitions. [2021-07-09 17:57:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:57:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:20,977 INFO L225 Difference]: With dead ends: 9228 [2021-07-09 17:57:20,977 INFO L226 Difference]: Without dead ends: 9200 [2021-07-09 17:57:20,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1364.8ms TimeCoverageRelationStatistics Valid=343, Invalid=2309, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:57:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9200 states. [2021-07-09 17:57:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9200 to 7989. [2021-07-09 17:57:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7989 states, 7988 states have (on average 4.4071106659989985) internal successors, (35204), 7988 states have internal predecessors, (35204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7989 states to 7989 states and 35204 transitions. [2021-07-09 17:57:21,156 INFO L78 Accepts]: Start accepts. Automaton has 7989 states and 35204 transitions. Word has length 33 [2021-07-09 17:57:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:21,156 INFO L482 AbstractCegarLoop]: Abstraction has 7989 states and 35204 transitions. [2021-07-09 17:57:21,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7989 states and 35204 transitions. [2021-07-09 17:57:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:21,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:21,172 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, 1, 1, 1] [2021-07-09 17:57:21,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-07-09 17:57:21,373 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:21,373 INFO L82 PathProgramCache]: Analyzing trace with hash 28128348, now seen corresponding path program 126 times [2021-07-09 17:57:21,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:21,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524311422] [2021-07-09 17:57:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:21,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524311422] [2021-07-09 17:57:21,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524311422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629285859] [2021-07-09 17:57:21,543 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 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 [2021-07-09 17:57:21,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:57:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:21,793 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-07-09 17:57:21,794 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 27 treesize of output 65 [2021-07-09 17:57:21,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:21,898 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.8 percent of original size [2021-07-09 17:57:21,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:21,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:66 [2021-07-09 17:57:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:22,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629285859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:22,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:22,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:57:22,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904775527] [2021-07-09 17:57:22,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:22,127 INFO L87 Difference]: Start difference. First operand 7989 states and 35204 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:22,416 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-09 17:57:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:23,954 INFO L93 Difference]: Finished difference Result 8441 states and 36961 transitions. [2021-07-09 17:57:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:57:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:23,978 INFO L225 Difference]: With dead ends: 8441 [2021-07-09 17:57:23,978 INFO L226 Difference]: Without dead ends: 8426 [2021-07-09 17:57:23,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1514.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:57:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-07-09 17:57:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 7977. [2021-07-09 17:57:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 4.407973921765296) internal successors, (35158), 7976 states have internal predecessors, (35158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 35158 transitions. [2021-07-09 17:57:24,125 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 35158 transitions. Word has length 33 [2021-07-09 17:57:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:24,125 INFO L482 AbstractCegarLoop]: Abstraction has 7977 states and 35158 transitions. [2021-07-09 17:57:24,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 35158 transitions. [2021-07-09 17:57:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:24,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:24,140 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, 1, 1, 1] [2021-07-09 17:57:24,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:24,340 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2103584114, now seen corresponding path program 127 times [2021-07-09 17:57:24,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:24,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215219666] [2021-07-09 17:57:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:24,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215219666] [2021-07-09 17:57:24,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215219666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441717493] [2021-07-09 17:57:24,525 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 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 [2021-07-09 17:57:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:24,755 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 [2021-07-09 17:57:24,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:24,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:24,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:24,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 17:57:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:24,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441717493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:24,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:24,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:57:24,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252255700] [2021-07-09 17:57:24,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:24,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:24,817 INFO L87 Difference]: Start difference. First operand 7977 states and 35158 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:26,266 INFO L93 Difference]: Finished difference Result 8611 states and 37664 transitions. [2021-07-09 17:57:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:57:26,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:26,291 INFO L225 Difference]: With dead ends: 8611 [2021-07-09 17:57:26,291 INFO L226 Difference]: Without dead ends: 8596 [2021-07-09 17:57:26,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1020.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:57:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2021-07-09 17:57:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 7977. [2021-07-09 17:57:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 4.407973921765296) internal successors, (35158), 7976 states have internal predecessors, (35158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 35158 transitions. [2021-07-09 17:57:26,446 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 35158 transitions. Word has length 33 [2021-07-09 17:57:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:26,446 INFO L482 AbstractCegarLoop]: Abstraction has 7977 states and 35158 transitions. [2021-07-09 17:57:26,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 35158 transitions. [2021-07-09 17:57:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:26,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:26,462 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, 1, 1, 1] [2021-07-09 17:57:26,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-09 17:57:26,662 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:26,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1757353836, now seen corresponding path program 128 times [2021-07-09 17:57:26,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:26,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789071294] [2021-07-09 17:57:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:26,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789071294] [2021-07-09 17:57:26,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789071294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537471693] [2021-07-09 17:57:26,835 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 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 [2021-07-09 17:57:26,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:26,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:57:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:27,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:27,097 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 [2021-07-09 17:57:27,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:27,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:27,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:27,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:42 [2021-07-09 17:57:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:27,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537471693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:27,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:27,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:27,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576596025] [2021-07-09 17:57:27,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:27,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:27,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:27,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:27,285 INFO L87 Difference]: Start difference. First operand 7977 states and 35158 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:28,255 INFO L93 Difference]: Finished difference Result 8422 states and 36826 transitions. [2021-07-09 17:57:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:57:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:28,280 INFO L225 Difference]: With dead ends: 8422 [2021-07-09 17:57:28,280 INFO L226 Difference]: Without dead ends: 8407 [2021-07-09 17:57:28,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 763.4ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:57:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2021-07-09 17:57:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 7965. [2021-07-09 17:57:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 4.40796082370668) internal successors, (35105), 7964 states have internal predecessors, (35105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 35105 transitions. [2021-07-09 17:57:28,424 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 35105 transitions. Word has length 33 [2021-07-09 17:57:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:28,424 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 35105 transitions. [2021-07-09 17:57:28,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 35105 transitions. [2021-07-09 17:57:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:28,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:28,439 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, 1, 1, 1] [2021-07-09 17:57:28,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-09 17:57:28,640 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash 793976442, now seen corresponding path program 129 times [2021-07-09 17:57:28,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:28,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845995894] [2021-07-09 17:57:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:28,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:28,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845995894] [2021-07-09 17:57:28,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845995894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:28,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888816415] [2021-07-09 17:57:28,808 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 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 [2021-07-09 17:57:28,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:57:28,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:28,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:29,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:29,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-09 17:57:29,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:29,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:29,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:29,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:36 [2021-07-09 17:57:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:29,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888816415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:29,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:29,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:29,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646409162] [2021-07-09 17:57:29,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:29,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:29,225 INFO L87 Difference]: Start difference. First operand 7965 states and 35105 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:29,924 INFO L93 Difference]: Finished difference Result 8230 states and 36123 transitions. [2021-07-09 17:57:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:57:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:29,949 INFO L225 Difference]: With dead ends: 8230 [2021-07-09 17:57:29,949 INFO L226 Difference]: Without dead ends: 8215 [2021-07-09 17:57:29,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:57:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8215 states. [2021-07-09 17:57:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8215 to 7967. [2021-07-09 17:57:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7967 states, 7966 states have (on average 4.407732864674868) internal successors, (35112), 7966 states have internal predecessors, (35112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7967 states to 7967 states and 35112 transitions. [2021-07-09 17:57:30,169 INFO L78 Accepts]: Start accepts. Automaton has 7967 states and 35112 transitions. Word has length 33 [2021-07-09 17:57:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:30,169 INFO L482 AbstractCegarLoop]: Abstraction has 7967 states and 35112 transitions. [2021-07-09 17:57:30,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7967 states and 35112 transitions. [2021-07-09 17:57:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:30,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:30,184 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, 1, 1, 1] [2021-07-09 17:57:30,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:30,384 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1163372282, now seen corresponding path program 130 times [2021-07-09 17:57:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:30,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325570559] [2021-07-09 17:57:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:30,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:30,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325570559] [2021-07-09 17:57:30,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325570559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212282444] [2021-07-09 17:57:30,569 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 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 [2021-07-09 17:57:30,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:30,768 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 [2021-07-09 17:57:30,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:30,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:30,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:30,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:57:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:30,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212282444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:30,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:30,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:57:30,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346137049] [2021-07-09 17:57:30,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:30,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:30,852 INFO L87 Difference]: Start difference. First operand 7967 states and 35112 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:32,322 INFO L93 Difference]: Finished difference Result 8620 states and 37745 transitions. [2021-07-09 17:57:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:57:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:32,348 INFO L225 Difference]: With dead ends: 8620 [2021-07-09 17:57:32,348 INFO L226 Difference]: Without dead ends: 8605 [2021-07-09 17:57:32,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1043.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:57:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-07-09 17:57:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 7959. [2021-07-09 17:57:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 4.40877104800201) internal successors, (35085), 7958 states have internal predecessors, (35085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 35085 transitions. [2021-07-09 17:57:32,512 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 35085 transitions. Word has length 33 [2021-07-09 17:57:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:32,513 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 35085 transitions. [2021-07-09 17:57:32,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 35085 transitions. [2021-07-09 17:57:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:32,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:32,529 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, 1, 1, 1] [2021-07-09 17:57:32,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:32,729 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash -889027030, now seen corresponding path program 131 times [2021-07-09 17:57:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:32,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206018094] [2021-07-09 17:57:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:32,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:32,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206018094] [2021-07-09 17:57:32,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206018094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:32,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416577827] [2021-07-09 17:57:32,971 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 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 [2021-07-09 17:57:33,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:57:33,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:33,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:33,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:33,185 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 [2021-07-09 17:57:33,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:33,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:33,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:33,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:57:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:33,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416577827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:33,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:33,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:57:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189009452] [2021-07-09 17:57:33,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:33,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:33,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:33,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:33,260 INFO L87 Difference]: Start difference. First operand 7959 states and 35085 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:34,761 INFO L93 Difference]: Finished difference Result 9968 states and 43133 transitions. [2021-07-09 17:57:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:57:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:34,790 INFO L225 Difference]: With dead ends: 9968 [2021-07-09 17:57:34,790 INFO L226 Difference]: Without dead ends: 9930 [2021-07-09 17:57:34,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1207.1ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:57:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9930 states. [2021-07-09 17:57:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9930 to 8187. [2021-07-09 17:57:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8187 states, 8186 states have (on average 4.420107500610799) internal successors, (36183), 8186 states have internal predecessors, (36183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8187 states to 8187 states and 36183 transitions. [2021-07-09 17:57:34,979 INFO L78 Accepts]: Start accepts. Automaton has 8187 states and 36183 transitions. Word has length 33 [2021-07-09 17:57:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:34,979 INFO L482 AbstractCegarLoop]: Abstraction has 8187 states and 36183 transitions. [2021-07-09 17:57:34,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8187 states and 36183 transitions. [2021-07-09 17:57:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:34,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:34,995 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, 1, 1, 1] [2021-07-09 17:57:35,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:35,195 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash 414245576, now seen corresponding path program 132 times [2021-07-09 17:57:35,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:35,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154109007] [2021-07-09 17:57:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:35,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154109007] [2021-07-09 17:57:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154109007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086028101] [2021-07-09 17:57:35,431 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 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 [2021-07-09 17:57:35,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:57:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:35,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:35,656 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:57:35,656 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 27 treesize of output 55 [2021-07-09 17:57:35,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:57:35,684 INFO L628 ElimStorePlain]: treesize reduction 84, result has 22.2 percent of original size [2021-07-09 17:57:35,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:35,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-07-09 17:57:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086028101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:35,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:57:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954167246] [2021-07-09 17:57:35,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:35,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:35,815 INFO L87 Difference]: Start difference. First operand 8187 states and 36183 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:37,503 INFO L93 Difference]: Finished difference Result 9592 states and 41585 transitions. [2021-07-09 17:57:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:57:37,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:37,531 INFO L225 Difference]: With dead ends: 9592 [2021-07-09 17:57:37,531 INFO L226 Difference]: Without dead ends: 9570 [2021-07-09 17:57:37,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1269.4ms TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:57:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9570 states. [2021-07-09 17:57:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9570 to 8382. [2021-07-09 17:57:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8382 states, 8381 states have (on average 4.422503281231356) internal successors, (37065), 8381 states have internal predecessors, (37065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 37065 transitions. [2021-07-09 17:57:37,776 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 37065 transitions. Word has length 33 [2021-07-09 17:57:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:37,776 INFO L482 AbstractCegarLoop]: Abstraction has 8382 states and 37065 transitions. [2021-07-09 17:57:37,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 37065 transitions. [2021-07-09 17:57:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:37,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:37,792 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, 1, 1, 1] [2021-07-09 17:57:37,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:37,993 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash -485116496, now seen corresponding path program 133 times [2021-07-09 17:57:37,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:37,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79274885] [2021-07-09 17:57:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79274885] [2021-07-09 17:57:38,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79274885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753520762] [2021-07-09 17:57:38,167 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 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 [2021-07-09 17:57:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:38,347 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 [2021-07-09 17:57:38,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:38,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:38,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:38,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:57:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753520762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:38,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:57:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067511844] [2021-07-09 17:57:38,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:38,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:38,428 INFO L87 Difference]: Start difference. First operand 8382 states and 37065 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:40,275 INFO L93 Difference]: Finished difference Result 10248 states and 44279 transitions. [2021-07-09 17:57:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:57:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:40,305 INFO L225 Difference]: With dead ends: 10248 [2021-07-09 17:57:40,305 INFO L226 Difference]: Without dead ends: 10205 [2021-07-09 17:57:40,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1427.6ms TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:57:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10205 states. [2021-07-09 17:57:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10205 to 8315. [2021-07-09 17:57:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8315 states, 8314 states have (on average 4.427592013471253) internal successors, (36811), 8314 states have internal predecessors, (36811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8315 states to 8315 states and 36811 transitions. [2021-07-09 17:57:40,533 INFO L78 Accepts]: Start accepts. Automaton has 8315 states and 36811 transitions. Word has length 33 [2021-07-09 17:57:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:40,533 INFO L482 AbstractCegarLoop]: Abstraction has 8315 states and 36811 transitions. [2021-07-09 17:57:40,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 8315 states and 36811 transitions. [2021-07-09 17:57:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:40,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:40,550 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, 1, 1, 1] [2021-07-09 17:57:40,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-09 17:57:40,750 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1871279144, now seen corresponding path program 134 times [2021-07-09 17:57:40,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:40,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374420735] [2021-07-09 17:57:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:40,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374420735] [2021-07-09 17:57:40,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374420735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805678330] [2021-07-09 17:57:40,919 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 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 [2021-07-09 17:57:40,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:40,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:40,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:57:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:41,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:41,127 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 [2021-07-09 17:57:41,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:41,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:41,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:41,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-07-09 17:57:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:41,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805678330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:41,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:41,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 17:57:41,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116770862] [2021-07-09 17:57:41,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:57:41,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:57:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:57:41,274 INFO L87 Difference]: Start difference. First operand 8315 states and 36811 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:43,395 INFO L93 Difference]: Finished difference Result 9453 states and 41464 transitions. [2021-07-09 17:57:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 17:57:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:43,423 INFO L225 Difference]: With dead ends: 9453 [2021-07-09 17:57:43,424 INFO L226 Difference]: Without dead ends: 9423 [2021-07-09 17:57:43,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1686.8ms TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:57:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9423 states. [2021-07-09 17:57:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9423 to 8300. [2021-07-09 17:57:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8300 states, 8299 states have (on average 4.428846849017954) internal successors, (36755), 8299 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 36755 transitions. [2021-07-09 17:57:43,577 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 36755 transitions. Word has length 33 [2021-07-09 17:57:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:43,578 INFO L482 AbstractCegarLoop]: Abstraction has 8300 states and 36755 transitions. [2021-07-09 17:57:43,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 36755 transitions. [2021-07-09 17:57:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:43,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:43,594 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, 1, 1, 1] [2021-07-09 17:57:43,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-09 17:57:43,794 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:43,794 INFO L82 PathProgramCache]: Analyzing trace with hash 204176622, now seen corresponding path program 135 times [2021-07-09 17:57:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:43,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964181751] [2021-07-09 17:57:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:43,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:43,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964181751] [2021-07-09 17:57:43,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964181751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:43,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19257699] [2021-07-09 17:57:43,964 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 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 [2021-07-09 17:57:44,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:57:44,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:44,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-09 17:57:44,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:44,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:44,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:44,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:36 [2021-07-09 17:57:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:44,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19257699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:44,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:44,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091999012] [2021-07-09 17:57:44,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:44,341 INFO L87 Difference]: Start difference. First operand 8300 states and 36755 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:45,292 INFO L93 Difference]: Finished difference Result 8854 states and 38974 transitions. [2021-07-09 17:57:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:57:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:45,317 INFO L225 Difference]: With dead ends: 8854 [2021-07-09 17:57:45,318 INFO L226 Difference]: Without dead ends: 8839 [2021-07-09 17:57:45,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2021-07-09 17:57:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 8288. [2021-07-09 17:57:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 4.428864486545192) internal successors, (36702), 8287 states have internal predecessors, (36702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 36702 transitions. [2021-07-09 17:57:45,537 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 36702 transitions. Word has length 33 [2021-07-09 17:57:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:45,537 INFO L482 AbstractCegarLoop]: Abstraction has 8288 states and 36702 transitions. [2021-07-09 17:57:45,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 36702 transitions. [2021-07-09 17:57:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:45,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:45,554 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, 1, 1, 1] [2021-07-09 17:57:45,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-09 17:57:45,754 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:45,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1060260590, now seen corresponding path program 136 times [2021-07-09 17:57:45,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:45,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650651661] [2021-07-09 17:57:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:45,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650651661] [2021-07-09 17:57:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650651661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797523195] [2021-07-09 17:57:45,926 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 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 [2021-07-09 17:57:45,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:46,079 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 [2021-07-09 17:57:46,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:46,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:46,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:46,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:57:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:46,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797523195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:46,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:46,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:57:46,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198667075] [2021-07-09 17:57:46,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:46,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:46,168 INFO L87 Difference]: Start difference. First operand 8288 states and 36702 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:47,655 INFO L93 Difference]: Finished difference Result 9785 states and 42725 transitions. [2021-07-09 17:57:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:57:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:47,683 INFO L225 Difference]: With dead ends: 9785 [2021-07-09 17:57:47,683 INFO L226 Difference]: Without dead ends: 9747 [2021-07-09 17:57:47,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:57:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2021-07-09 17:57:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 8534. [2021-07-09 17:57:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 4.434079456228759) internal successors, (37836), 8533 states have internal predecessors, (37836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 37836 transitions. [2021-07-09 17:57:47,898 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 37836 transitions. Word has length 33 [2021-07-09 17:57:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:47,899 INFO L482 AbstractCegarLoop]: Abstraction has 8534 states and 37836 transitions. [2021-07-09 17:57:47,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 37836 transitions. [2021-07-09 17:57:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:47,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:47,915 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, 1, 1, 1] [2021-07-09 17:57:48,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:48,116 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1931434100, now seen corresponding path program 137 times [2021-07-09 17:57:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:48,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61895278] [2021-07-09 17:57:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:48,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:48,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61895278] [2021-07-09 17:57:48,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61895278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13243938] [2021-07-09 17:57:48,286 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 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 [2021-07-09 17:57:48,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:57:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:48,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:57:48,445 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 29 treesize of output 13 [2021-07-09 17:57:48,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:48,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:48,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:48,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:57:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:48,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13243938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:48,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:48,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:57:48,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012958412] [2021-07-09 17:57:48,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:48,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:48,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:48,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:48,540 INFO L87 Difference]: Start difference. First operand 8534 states and 37836 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:49,666 INFO L93 Difference]: Finished difference Result 9563 states and 41674 transitions. [2021-07-09 17:57:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:57:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:49,695 INFO L225 Difference]: With dead ends: 9563 [2021-07-09 17:57:49,695 INFO L226 Difference]: Without dead ends: 9523 [2021-07-09 17:57:49,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 921.8ms TimeCoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:57:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-07-09 17:57:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 8497. [2021-07-09 17:57:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 4.435381355932203) internal successors, (37683), 8496 states have internal predecessors, (37683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 37683 transitions. [2021-07-09 17:57:49,874 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 37683 transitions. Word has length 33 [2021-07-09 17:57:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:49,874 INFO L482 AbstractCegarLoop]: Abstraction has 8497 states and 37683 transitions. [2021-07-09 17:57:49,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 37683 transitions. [2021-07-09 17:57:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:49,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:49,891 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, 1, 1, 1] [2021-07-09 17:57:50,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:50,091 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash 78008476, now seen corresponding path program 138 times [2021-07-09 17:57:50,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:50,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461229554] [2021-07-09 17:57:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:50,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461229554] [2021-07-09 17:57:50,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461229554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502754453] [2021-07-09 17:57:50,327 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 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 [2021-07-09 17:57:50,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:57:50,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:50,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:50,545 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-07-09 17:57:50,545 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 29 treesize of output 67 [2021-07-09 17:57:50,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:50,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:50,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:50,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:71 [2021-07-09 17:57:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:50,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502754453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:50,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:50,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:57:50,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373816540] [2021-07-09 17:57:50,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:50,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:50,909 INFO L87 Difference]: Start difference. First operand 8497 states and 37683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:53,009 INFO L93 Difference]: Finished difference Result 9057 states and 39876 transitions. [2021-07-09 17:57:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:57:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:53,036 INFO L225 Difference]: With dead ends: 9057 [2021-07-09 17:57:53,036 INFO L226 Difference]: Without dead ends: 9013 [2021-07-09 17:57:53,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1824.2ms TimeCoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:57:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9013 states. [2021-07-09 17:57:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9013 to 8515. [2021-07-09 17:57:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8514 states have (on average 4.436457599248297) internal successors, (37772), 8514 states have internal predecessors, (37772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 37772 transitions. [2021-07-09 17:57:53,191 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 37772 transitions. Word has length 33 [2021-07-09 17:57:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:53,191 INFO L482 AbstractCegarLoop]: Abstraction has 8515 states and 37772 transitions. [2021-07-09 17:57:53,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 37772 transitions. [2021-07-09 17:57:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:53,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:53,208 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, 1, 1, 1] [2021-07-09 17:57:53,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:53,409 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -970763926, now seen corresponding path program 139 times [2021-07-09 17:57:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:53,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835810644] [2021-07-09 17:57:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:53,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:53,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835810644] [2021-07-09 17:57:53,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835810644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:53,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809963822] [2021-07-09 17:57:53,585 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 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 [2021-07-09 17:57:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:53,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:53,738 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 [2021-07-09 17:57:53,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:53,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:53,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:53,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:57:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:53,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809963822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:53,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:53,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:57:53,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582205545] [2021-07-09 17:57:53,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:57:53,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:57:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:57:53,828 INFO L87 Difference]: Start difference. First operand 8515 states and 37772 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:55,687 INFO L93 Difference]: Finished difference Result 10249 states and 44471 transitions. [2021-07-09 17:57:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:57:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:55,718 INFO L225 Difference]: With dead ends: 10249 [2021-07-09 17:57:55,718 INFO L226 Difference]: Without dead ends: 10211 [2021-07-09 17:57:55,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1486.8ms TimeCoverageRelationStatistics Valid=482, Invalid=2824, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:57:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-07-09 17:57:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 8676. [2021-07-09 17:57:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 4.440461095100865) internal successors, (38521), 8675 states have internal predecessors, (38521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 38521 transitions. [2021-07-09 17:57:55,903 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 38521 transitions. Word has length 33 [2021-07-09 17:57:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:55,903 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 38521 transitions. [2021-07-09 17:57:55,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 38521 transitions. [2021-07-09 17:57:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:55,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:55,920 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, 1, 1, 1] [2021-07-09 17:57:56,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-09 17:57:56,121 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 332508680, now seen corresponding path program 140 times [2021-07-09 17:57:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:56,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513749165] [2021-07-09 17:57:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:56,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:56,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513749165] [2021-07-09 17:57:56,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513749165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:56,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060607927] [2021-07-09 17:57:56,300 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 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 [2021-07-09 17:57:56,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:56,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:56,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:57:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:56,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:56,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:57:56,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:56,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:56,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:56,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:57:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:56,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060607927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:56,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:56,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609564274] [2021-07-09 17:57:56,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:56,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:56,669 INFO L87 Difference]: Start difference. First operand 8676 states and 38521 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,070 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 17:57:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:58,260 INFO L93 Difference]: Finished difference Result 9607 states and 42063 transitions. [2021-07-09 17:57:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:57:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:57:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:58,288 INFO L225 Difference]: With dead ends: 9607 [2021-07-09 17:57:58,288 INFO L226 Difference]: Without dead ends: 9594 [2021-07-09 17:57:58,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1452.3ms TimeCoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:57:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9594 states. [2021-07-09 17:57:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 8697. [2021-07-09 17:57:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8697 states, 8696 states have (on average 4.440892364305427) internal successors, (38618), 8696 states have internal predecessors, (38618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8697 states to 8697 states and 38618 transitions. [2021-07-09 17:57:58,471 INFO L78 Accepts]: Start accepts. Automaton has 8697 states and 38618 transitions. Word has length 33 [2021-07-09 17:57:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:58,471 INFO L482 AbstractCegarLoop]: Abstraction has 8697 states and 38618 transitions. [2021-07-09 17:57:58,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8697 states and 38618 transitions. [2021-07-09 17:57:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:58,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:58,489 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, 1, 1, 1] [2021-07-09 17:57:58,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 17:57:58,701 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash -566853392, now seen corresponding path program 141 times [2021-07-09 17:57:58,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:58,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183055585] [2021-07-09 17:57:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:58,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:58,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183055585] [2021-07-09 17:57:58,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183055585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:58,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097260519] [2021-07-09 17:57:58,891 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 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 [2021-07-09 17:57:58,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:57:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:57:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:59,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:59,056 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 [2021-07-09 17:57:59,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:57:59,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:57:59,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:57:59,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 17:57:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:59,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097260519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:59,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:59,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:57:59,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858311690] [2021-07-09 17:57:59,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:59,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:59,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:59,235 INFO L87 Difference]: Start difference. First operand 8697 states and 38618 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:00,595 INFO L93 Difference]: Finished difference Result 9635 states and 42211 transitions. [2021-07-09 17:58:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:58:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:00,624 INFO L225 Difference]: With dead ends: 9635 [2021-07-09 17:58:00,624 INFO L226 Difference]: Without dead ends: 9605 [2021-07-09 17:58:00,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1095.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:58:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-07-09 17:58:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8701. [2021-07-09 17:58:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 4.440689655172414) internal successors, (38634), 8700 states have internal predecessors, (38634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 38634 transitions. [2021-07-09 17:58:00,803 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 38634 transitions. Word has length 33 [2021-07-09 17:58:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:00,803 INFO L482 AbstractCegarLoop]: Abstraction has 8701 states and 38634 transitions. [2021-07-09 17:58:00,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 38634 transitions. [2021-07-09 17:58:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:00,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:00,820 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, 1, 1, 1] [2021-07-09 17:58:01,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-07-09 17:58:01,020 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1947515602, now seen corresponding path program 142 times [2021-07-09 17:58:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:01,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092351781] [2021-07-09 17:58:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092351781] [2021-07-09 17:58:01,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092351781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127829880] [2021-07-09 17:58:01,192 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 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 [2021-07-09 17:58:01,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:01,355 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 29 treesize of output 13 [2021-07-09 17:58:01,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:01,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:01,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:01,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:58:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127829880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:01,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:01,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:58:01,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476677015] [2021-07-09 17:58:01,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:01,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:01,451 INFO L87 Difference]: Start difference. First operand 8701 states and 38634 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:02,919 INFO L93 Difference]: Finished difference Result 10005 states and 43498 transitions. [2021-07-09 17:58:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:58:02,919 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:02,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:02,948 INFO L225 Difference]: With dead ends: 10005 [2021-07-09 17:58:02,948 INFO L226 Difference]: Without dead ends: 9971 [2021-07-09 17:58:02,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1147.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:58:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2021-07-09 17:58:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 8710. [2021-07-09 17:58:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8709 states have (on average 4.443334481570789) internal successors, (38697), 8709 states have internal predecessors, (38697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 38697 transitions. [2021-07-09 17:58:03,123 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 38697 transitions. Word has length 33 [2021-07-09 17:58:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:03,123 INFO L482 AbstractCegarLoop]: Abstraction has 8710 states and 38697 transitions. [2021-07-09 17:58:03,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 38697 transitions. [2021-07-09 17:58:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:03,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:03,140 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, 1, 1, 1] [2021-07-09 17:58:03,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-09 17:58:03,341 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -451531606, now seen corresponding path program 143 times [2021-07-09 17:58:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:03,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075296695] [2021-07-09 17:58:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:03,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:03,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075296695] [2021-07-09 17:58:03,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075296695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:03,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564949024] [2021-07-09 17:58:03,517 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 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 [2021-07-09 17:58:03,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:58:03,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:03,680 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 [2021-07-09 17:58:03,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:03,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:03,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:03,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:58:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564949024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:03,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:03,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:58:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378817712] [2021-07-09 17:58:03,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:03,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:03,777 INFO L87 Difference]: Start difference. First operand 8710 states and 38697 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:05,447 INFO L93 Difference]: Finished difference Result 9504 states and 41867 transitions. [2021-07-09 17:58:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:58:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:05,476 INFO L225 Difference]: With dead ends: 9504 [2021-07-09 17:58:05,476 INFO L226 Difference]: Without dead ends: 9476 [2021-07-09 17:58:05,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1236.5ms TimeCoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:58:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-07-09 17:58:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8698. [2021-07-09 17:58:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8698 states, 8697 states have (on average 4.443831206163045) internal successors, (38648), 8697 states have internal predecessors, (38648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8698 states to 8698 states and 38648 transitions. [2021-07-09 17:58:05,648 INFO L78 Accepts]: Start accepts. Automaton has 8698 states and 38648 transitions. Word has length 33 [2021-07-09 17:58:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:05,648 INFO L482 AbstractCegarLoop]: Abstraction has 8698 states and 38648 transitions. [2021-07-09 17:58:05,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8698 states and 38648 transitions. [2021-07-09 17:58:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:05,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:05,665 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, 1, 1, 1] [2021-07-09 17:58:05,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:05,866 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2108014974, now seen corresponding path program 144 times [2021-07-09 17:58:05,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:05,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123618227] [2021-07-09 17:58:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:06,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123618227] [2021-07-09 17:58:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123618227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336246744] [2021-07-09 17:58:06,017 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 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 [2021-07-09 17:58:06,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:58:06,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:06,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:06,235 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:58:06,235 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 27 treesize of output 55 [2021-07-09 17:58:06,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:58:06,268 INFO L628 ElimStorePlain]: treesize reduction 84, result has 20.8 percent of original size [2021-07-09 17:58:06,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:06,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:58:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:06,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336246744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:06,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:06,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:58:06,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831992391] [2021-07-09 17:58:06,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:58:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:58:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:58:06,387 INFO L87 Difference]: Start difference. First operand 8698 states and 38648 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:07,899 INFO L93 Difference]: Finished difference Result 9881 states and 43187 transitions. [2021-07-09 17:58:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:58:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:07,928 INFO L225 Difference]: With dead ends: 9881 [2021-07-09 17:58:07,929 INFO L226 Difference]: Without dead ends: 9867 [2021-07-09 17:58:07,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1135.6ms TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:58:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2021-07-09 17:58:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 8807. [2021-07-09 17:58:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 4.445832387008857) internal successors, (39150), 8806 states have internal predecessors, (39150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 39150 transitions. [2021-07-09 17:58:08,112 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 39150 transitions. Word has length 33 [2021-07-09 17:58:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:08,112 INFO L482 AbstractCegarLoop]: Abstraction has 8807 states and 39150 transitions. [2021-07-09 17:58:08,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 39150 transitions. [2021-07-09 17:58:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:08,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:08,130 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, 1, 1, 1] [2021-07-09 17:58:08,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-07-09 17:58:08,330 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1096448042, now seen corresponding path program 145 times [2021-07-09 17:58:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:08,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145946694] [2021-07-09 17:58:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:08,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:08,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145946694] [2021-07-09 17:58:08,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145946694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:08,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520428807] [2021-07-09 17:58:08,485 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 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 [2021-07-09 17:58:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:08,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:08,664 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 28 treesize of output 12 [2021-07-09 17:58:08,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:08,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:08,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:08,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:58:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:08,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520428807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:08,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:08,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:58:08,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866848421] [2021-07-09 17:58:08,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:08,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:08,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:08,742 INFO L87 Difference]: Start difference. First operand 8807 states and 39150 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:09,786 INFO L93 Difference]: Finished difference Result 10513 states and 45574 transitions. [2021-07-09 17:58:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:58:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:09,818 INFO L225 Difference]: With dead ends: 10513 [2021-07-09 17:58:09,818 INFO L226 Difference]: Without dead ends: 10489 [2021-07-09 17:58:09,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:58:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10489 states. [2021-07-09 17:58:10,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10489 to 8904. [2021-07-09 17:58:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8904 states, 8903 states have (on average 4.451533191059194) internal successors, (39632), 8903 states have internal predecessors, (39632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 39632 transitions. [2021-07-09 17:58:10,087 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 39632 transitions. Word has length 33 [2021-07-09 17:58:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:10,087 INFO L482 AbstractCegarLoop]: Abstraction has 8904 states and 39632 transitions. [2021-07-09 17:58:10,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 39632 transitions. [2021-07-09 17:58:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:10,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:10,104 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, 1, 1, 1] [2021-07-09 17:58:10,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-09 17:58:10,305 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash -571945400, now seen corresponding path program 146 times [2021-07-09 17:58:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:10,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482064030] [2021-07-09 17:58:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:10,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:10,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482064030] [2021-07-09 17:58:10,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482064030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:10,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519358427] [2021-07-09 17:58:10,460 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 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 [2021-07-09 17:58:10,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:10,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:10,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:58:10,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:10,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:10,635 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 [2021-07-09 17:58:10,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:10,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:10,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:10,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-07-09 17:58:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519358427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:10,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:10,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:58:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937056709] [2021-07-09 17:58:10,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:10,772 INFO L87 Difference]: Start difference. First operand 8904 states and 39632 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:11,837 INFO L93 Difference]: Finished difference Result 9740 states and 42844 transitions. [2021-07-09 17:58:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:58:11,837 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:11,866 INFO L225 Difference]: With dead ends: 9740 [2021-07-09 17:58:11,866 INFO L226 Difference]: Without dead ends: 9717 [2021-07-09 17:58:11,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:58:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2021-07-09 17:58:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 8864. [2021-07-09 17:58:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.453571025612095) internal successors, (39472), 8863 states have internal predecessors, (39472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 39472 transitions. [2021-07-09 17:58:12,134 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 39472 transitions. Word has length 33 [2021-07-09 17:58:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:12,134 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 39472 transitions. [2021-07-09 17:58:12,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 39472 transitions. [2021-07-09 17:58:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:12,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:12,151 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, 1, 1, 1] [2021-07-09 17:58:12,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:12,353 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:12,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash -719490802, now seen corresponding path program 147 times [2021-07-09 17:58:12,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:12,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91055470] [2021-07-09 17:58:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:12,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91055470] [2021-07-09 17:58:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91055470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007378207] [2021-07-09 17:58:12,510 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 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 [2021-07-09 17:58:12,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:58:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:12,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 17:58:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:12,692 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 [2021-07-09 17:58:12,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:12,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:12,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:12,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2021-07-09 17:58:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:12,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007378207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:12,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:12,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:58:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963873290] [2021-07-09 17:58:12,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:12,811 INFO L87 Difference]: Start difference. First operand 8864 states and 39472 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:14,202 INFO L93 Difference]: Finished difference Result 10230 states and 44560 transitions. [2021-07-09 17:58:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:58:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:14,232 INFO L225 Difference]: With dead ends: 10230 [2021-07-09 17:58:14,232 INFO L226 Difference]: Without dead ends: 10171 [2021-07-09 17:58:14,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1061.1ms TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:58:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10171 states. [2021-07-09 17:58:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10171 to 8861. [2021-07-09 17:58:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8861 states, 8860 states have (on average 4.453611738148984) internal successors, (39459), 8860 states have internal predecessors, (39459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8861 states to 8861 states and 39459 transitions. [2021-07-09 17:58:14,477 INFO L78 Accepts]: Start accepts. Automaton has 8861 states and 39459 transitions. Word has length 33 [2021-07-09 17:58:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:14,477 INFO L482 AbstractCegarLoop]: Abstraction has 8861 states and 39459 transitions. [2021-07-09 17:58:14,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8861 states and 39459 transitions. [2021-07-09 17:58:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:14,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:14,494 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, 1, 1, 1] [2021-07-09 17:58:14,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-09 17:58:14,694 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash -294598488, now seen corresponding path program 148 times [2021-07-09 17:58:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:14,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438110847] [2021-07-09 17:58:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:14,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:14,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438110847] [2021-07-09 17:58:14,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438110847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:14,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849498226] [2021-07-09 17:58:14,862 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 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 [2021-07-09 17:58:14,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:15,059 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 28 treesize of output 12 [2021-07-09 17:58:15,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:15,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:15,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:15,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:58:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:15,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849498226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:15,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:58:15,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756302097] [2021-07-09 17:58:15,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:15,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:15,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:15,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:15,138 INFO L87 Difference]: Start difference. First operand 8861 states and 39459 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:16,613 INFO L93 Difference]: Finished difference Result 10445 states and 45680 transitions. [2021-07-09 17:58:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:58:16,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:16,645 INFO L225 Difference]: With dead ends: 10445 [2021-07-09 17:58:16,645 INFO L226 Difference]: Without dead ends: 10415 [2021-07-09 17:58:16,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1045.3ms TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:58:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10415 states. [2021-07-09 17:58:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10415 to 8858. [2021-07-09 17:58:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 8857 states have (on average 4.454217003500056) internal successors, (39451), 8857 states have internal predecessors, (39451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 39451 transitions. [2021-07-09 17:58:16,902 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 39451 transitions. Word has length 33 [2021-07-09 17:58:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:16,902 INFO L482 AbstractCegarLoop]: Abstraction has 8858 states and 39451 transitions. [2021-07-09 17:58:16,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 39451 transitions. [2021-07-09 17:58:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:16,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:16,919 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, 1, 1, 1] [2021-07-09 17:58:17,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:17,120 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash -237664702, now seen corresponding path program 149 times [2021-07-09 17:58:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:17,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192261266] [2021-07-09 17:58:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:17,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192261266] [2021-07-09 17:58:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192261266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154163059] [2021-07-09 17:58:17,281 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 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 [2021-07-09 17:58:17,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:58:17,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:17,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:17,435 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 29 treesize of output 13 [2021-07-09 17:58:17,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:17,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:17,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:17,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:58:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154163059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:17,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:58:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542940046] [2021-07-09 17:58:17,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:17,526 INFO L87 Difference]: Start difference. First operand 8858 states and 39451 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:18,544 INFO L93 Difference]: Finished difference Result 9976 states and 43691 transitions. [2021-07-09 17:58:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:58:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:18,575 INFO L225 Difference]: With dead ends: 9976 [2021-07-09 17:58:18,575 INFO L226 Difference]: Without dead ends: 9943 [2021-07-09 17:58:18,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:58:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9943 states. [2021-07-09 17:58:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9943 to 8904. [2021-07-09 17:58:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8904 states, 8903 states have (on average 4.459171065932831) internal successors, (39700), 8903 states have internal predecessors, (39700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 39700 transitions. [2021-07-09 17:58:18,775 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 39700 transitions. Word has length 33 [2021-07-09 17:58:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:18,776 INFO L482 AbstractCegarLoop]: Abstraction has 8904 states and 39700 transitions. [2021-07-09 17:58:18,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 39700 transitions. [2021-07-09 17:58:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:18,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:18,869 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, 1, 1, 1] [2021-07-09 17:58:19,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-09 17:58:19,070 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1207935470, now seen corresponding path program 150 times [2021-07-09 17:58:19,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:19,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933766292] [2021-07-09 17:58:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:19,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933766292] [2021-07-09 17:58:19,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933766292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428119031] [2021-07-09 17:58:19,260 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 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 [2021-07-09 17:58:19,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:58:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:19,458 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:58:19,458 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 29 treesize of output 57 [2021-07-09 17:58:19,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:19,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:19,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:19,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 17:58:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428119031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:19,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:19,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:58:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250075669] [2021-07-09 17:58:19,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:58:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:58:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:58:19,679 INFO L87 Difference]: Start difference. First operand 8904 states and 39700 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:21,335 INFO L93 Difference]: Finished difference Result 9611 states and 42438 transitions. [2021-07-09 17:58:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:58:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:21,362 INFO L225 Difference]: With dead ends: 9611 [2021-07-09 17:58:21,362 INFO L226 Difference]: Without dead ends: 9584 [2021-07-09 17:58:21,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1289.1ms TimeCoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:58:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-07-09 17:58:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 8922. [2021-07-09 17:58:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8922 states, 8921 states have (on average 4.460486492545678) internal successors, (39792), 8921 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8922 states to 8922 states and 39792 transitions. [2021-07-09 17:58:21,565 INFO L78 Accepts]: Start accepts. Automaton has 8922 states and 39792 transitions. Word has length 33 [2021-07-09 17:58:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:21,565 INFO L482 AbstractCegarLoop]: Abstraction has 8922 states and 39792 transitions. [2021-07-09 17:58:21,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8922 states and 39792 transitions. [2021-07-09 17:58:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:21,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:21,583 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, 1, 1, 1] [2021-07-09 17:58:21,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:21,784 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2026278078, now seen corresponding path program 151 times [2021-07-09 17:58:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:21,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020584817] [2021-07-09 17:58:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:21,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020584817] [2021-07-09 17:58:21,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020584817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447157196] [2021-07-09 17:58:21,947 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 [2021-07-09 17:58:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:21,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:22,101 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 29 treesize of output 13 [2021-07-09 17:58:22,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:22,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:22,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:22,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:58:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:22,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447157196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:22,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:22,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:58:22,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107042292] [2021-07-09 17:58:22,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:58:22,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:58:22,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:58:22,188 INFO L87 Difference]: Start difference. First operand 8922 states and 39792 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:23,353 INFO L93 Difference]: Finished difference Result 10339 states and 45024 transitions. [2021-07-09 17:58:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:58:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:23,383 INFO L225 Difference]: With dead ends: 10339 [2021-07-09 17:58:23,383 INFO L226 Difference]: Without dead ends: 10294 [2021-07-09 17:58:23,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 916.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:58:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-07-09 17:58:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 8921. [2021-07-09 17:58:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8921 states, 8920 states have (on average 4.464349775784753) internal successors, (39822), 8920 states have internal predecessors, (39822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8921 states to 8921 states and 39822 transitions. [2021-07-09 17:58:23,633 INFO L78 Accepts]: Start accepts. Automaton has 8921 states and 39822 transitions. Word has length 33 [2021-07-09 17:58:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:23,633 INFO L482 AbstractCegarLoop]: Abstraction has 8921 states and 39822 transitions. [2021-07-09 17:58:23,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8921 states and 39822 transitions. [2021-07-09 17:58:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:23,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:23,651 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, 1, 1, 1] [2021-07-09 17:58:23,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-07-09 17:58:23,851 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1975808804, now seen corresponding path program 152 times [2021-07-09 17:58:23,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:23,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436713075] [2021-07-09 17:58:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:24,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:24,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436713075] [2021-07-09 17:58:24,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436713075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:24,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150535514] [2021-07-09 17:58:24,016 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 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 [2021-07-09 17:58:24,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:24,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:24,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:24,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:24,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 17:58:24,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:24,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:24,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:24,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 17:58:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:24,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150535514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:24,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:24,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:58:24,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445494048] [2021-07-09 17:58:24,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:58:24,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:58:24,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:58:24,374 INFO L87 Difference]: Start difference. First operand 8921 states and 39822 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:25,724 INFO L93 Difference]: Finished difference Result 9531 states and 42253 transitions. [2021-07-09 17:58:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:58:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:25,816 INFO L225 Difference]: With dead ends: 9531 [2021-07-09 17:58:25,817 INFO L226 Difference]: Without dead ends: 9518 [2021-07-09 17:58:25,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1146.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:58:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-07-09 17:58:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 8906. [2021-07-09 17:58:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8906 states, 8905 states have (on average 4.465244244806288) internal successors, (39763), 8905 states have internal predecessors, (39763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8906 states to 8906 states and 39763 transitions. [2021-07-09 17:58:26,027 INFO L78 Accepts]: Start accepts. Automaton has 8906 states and 39763 transitions. Word has length 33 [2021-07-09 17:58:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:26,027 INFO L482 AbstractCegarLoop]: Abstraction has 8906 states and 39763 transitions. [2021-07-09 17:58:26,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8906 states and 39763 transitions. [2021-07-09 17:58:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:26,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:26,046 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, 1, 1, 1] [2021-07-09 17:58:26,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-09 17:58:26,247 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash -553077526, now seen corresponding path program 153 times [2021-07-09 17:58:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:26,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402389355] [2021-07-09 17:58:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:26,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:26,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402389355] [2021-07-09 17:58:26,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402389355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:26,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928938061] [2021-07-09 17:58:26,434 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 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 [2021-07-09 17:58:26,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:58:26,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:26,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:26,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:26,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:26,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:58:26,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:26,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:26,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:26,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:58:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:26,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928938061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:26,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:26,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:58:26,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286240293] [2021-07-09 17:58:26,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:58:26,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:58:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:58:26,800 INFO L87 Difference]: Start difference. First operand 8906 states and 39763 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:28,270 INFO L93 Difference]: Finished difference Result 9479 states and 41946 transitions. [2021-07-09 17:58:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:58:28,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:28,299 INFO L225 Difference]: With dead ends: 9479 [2021-07-09 17:58:28,299 INFO L226 Difference]: Without dead ends: 9462 [2021-07-09 17:58:28,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1425.8ms TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:58:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-07-09 17:58:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 8915. [2021-07-09 17:58:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8915 states, 8914 states have (on average 4.463316131927305) internal successors, (39786), 8914 states have internal predecessors, (39786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8915 states to 8915 states and 39786 transitions. [2021-07-09 17:58:28,540 INFO L78 Accepts]: Start accepts. Automaton has 8915 states and 39786 transitions. Word has length 33 [2021-07-09 17:58:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:28,540 INFO L482 AbstractCegarLoop]: Abstraction has 8915 states and 39786 transitions. [2021-07-09 17:58:28,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 8915 states and 39786 transitions. [2021-07-09 17:58:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:28,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:28,558 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, 1, 1, 1] [2021-07-09 17:58:28,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-09 17:58:28,759 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:28,759 INFO L82 PathProgramCache]: Analyzing trace with hash -606464046, now seen corresponding path program 154 times [2021-07-09 17:58:28,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:28,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988264055] [2021-07-09 17:58:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:29,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:29,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988264055] [2021-07-09 17:58:29,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988264055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:29,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122673483] [2021-07-09 17:58:29,000 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 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 [2021-07-09 17:58:29,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:29,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:29,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:29,153 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 29 treesize of output 13 [2021-07-09 17:58:29,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:29,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:29,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:29,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:58:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122673483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:29,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:29,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:58:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197176801] [2021-07-09 17:58:29,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:29,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:29,251 INFO L87 Difference]: Start difference. First operand 8915 states and 39786 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:31,471 INFO L93 Difference]: Finished difference Result 10812 states and 46519 transitions. [2021-07-09 17:58:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:58:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:31,504 INFO L225 Difference]: With dead ends: 10812 [2021-07-09 17:58:31,504 INFO L226 Difference]: Without dead ends: 10751 [2021-07-09 17:58:31,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2007.6ms TimeCoverageRelationStatistics Valid=583, Invalid=2497, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:58:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2021-07-09 17:58:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 8993. [2021-07-09 17:58:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8993 states, 8992 states have (on average 4.47153024911032) internal successors, (40208), 8992 states have internal predecessors, (40208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8993 states to 8993 states and 40208 transitions. [2021-07-09 17:58:31,744 INFO L78 Accepts]: Start accepts. Automaton has 8993 states and 40208 transitions. Word has length 33 [2021-07-09 17:58:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:31,745 INFO L482 AbstractCegarLoop]: Abstraction has 8993 states and 40208 transitions. [2021-07-09 17:58:31,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8993 states and 40208 transitions. [2021-07-09 17:58:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:31,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:31,762 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, 1, 1, 1] [2021-07-09 17:58:31,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-07-09 17:58:31,963 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1456365050, now seen corresponding path program 155 times [2021-07-09 17:58:31,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:31,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719935124] [2021-07-09 17:58:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719935124] [2021-07-09 17:58:32,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719935124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687769541] [2021-07-09 17:58:32,212 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 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 [2021-07-09 17:58:32,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:58:32,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:32,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 17:58:32,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:32,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:32,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:32,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:58:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687769541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:32,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:58:32,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034299516] [2021-07-09 17:58:32,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:32,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:32,461 INFO L87 Difference]: Start difference. First operand 8993 states and 40208 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:33,445 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-09 17:58:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:35,561 INFO L93 Difference]: Finished difference Result 10544 states and 45837 transitions. [2021-07-09 17:58:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:58:35,561 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:35,593 INFO L225 Difference]: With dead ends: 10544 [2021-07-09 17:58:35,593 INFO L226 Difference]: Without dead ends: 10486 [2021-07-09 17:58:35,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2633.9ms TimeCoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:58:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2021-07-09 17:58:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 8990. [2021-07-09 17:58:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8989 states have (on average 4.472021359439315) internal successors, (40199), 8989 states have internal predecessors, (40199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40199 transitions. [2021-07-09 17:58:35,788 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40199 transitions. Word has length 33 [2021-07-09 17:58:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:35,788 INFO L482 AbstractCegarLoop]: Abstraction has 8990 states and 40199 transitions. [2021-07-09 17:58:35,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40199 transitions. [2021-07-09 17:58:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:35,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:35,809 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, 1, 1, 1] [2021-07-09 17:58:36,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-09 17:58:36,017 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1103225560, now seen corresponding path program 156 times [2021-07-09 17:58:36,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:36,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29818697] [2021-07-09 17:58:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:36,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:36,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29818697] [2021-07-09 17:58:36,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29818697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:36,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144778731] [2021-07-09 17:58:36,251 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 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 [2021-07-09 17:58:36,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:58:36,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:58:36,444 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:58:36,444 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 29 treesize of output 57 [2021-07-09 17:58:36,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:36,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:36,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:36,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-09 17:58:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:36,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144778731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:36,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:36,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:58:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422924474] [2021-07-09 17:58:36,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:58:36,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:58:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:58:36,627 INFO L87 Difference]: Start difference. First operand 8990 states and 40199 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:38,677 INFO L93 Difference]: Finished difference Result 9552 states and 42282 transitions. [2021-07-09 17:58:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:58:38,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:38,705 INFO L225 Difference]: With dead ends: 9552 [2021-07-09 17:58:38,705 INFO L226 Difference]: Without dead ends: 9506 [2021-07-09 17:58:38,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1824.5ms TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:58:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9506 states. [2021-07-09 17:58:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9506 to 8996. [2021-07-09 17:58:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 4.470372429127293) internal successors, (40211), 8995 states have internal predecessors, (40211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 40211 transitions. [2021-07-09 17:58:38,893 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 40211 transitions. Word has length 33 [2021-07-09 17:58:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:38,893 INFO L482 AbstractCegarLoop]: Abstraction has 8996 states and 40211 transitions. [2021-07-09 17:58:38,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 40211 transitions. [2021-07-09 17:58:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:38,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:38,911 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, 1, 1, 1] [2021-07-09 17:58:39,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 17:58:39,111 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:39,112 INFO L82 PathProgramCache]: Analyzing trace with hash 914383994, now seen corresponding path program 157 times [2021-07-09 17:58:39,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:39,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058928858] [2021-07-09 17:58:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:39,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:39,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058928858] [2021-07-09 17:58:39,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058928858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:39,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333434977] [2021-07-09 17:58:39,349 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 [2021-07-09 17:58:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:39,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:39,500 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 21 treesize of output 13 [2021-07-09 17:58:39,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:39,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:39,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:39,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:58:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:39,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333434977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:39,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:39,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:58:39,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417143929] [2021-07-09 17:58:39,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:39,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:39,596 INFO L87 Difference]: Start difference. First operand 8996 states and 40211 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:41,872 INFO L93 Difference]: Finished difference Result 9838 states and 43435 transitions. [2021-07-09 17:58:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:58:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:41,901 INFO L225 Difference]: With dead ends: 9838 [2021-07-09 17:58:41,902 INFO L226 Difference]: Without dead ends: 9800 [2021-07-09 17:58:41,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1948.2ms TimeCoverageRelationStatistics Valid=552, Invalid=2754, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:58:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9800 states. [2021-07-09 17:58:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 8984. [2021-07-09 17:58:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 4.472002671713236) internal successors, (40172), 8983 states have internal predecessors, (40172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 40172 transitions. [2021-07-09 17:58:42,084 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 40172 transitions. Word has length 33 [2021-07-09 17:58:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:42,084 INFO L482 AbstractCegarLoop]: Abstraction has 8984 states and 40172 transitions. [2021-07-09 17:58:42,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 40172 transitions. [2021-07-09 17:58:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:42,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:42,102 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, 1, 1, 1] [2021-07-09 17:58:42,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:42,303 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash 407592648, now seen corresponding path program 158 times [2021-07-09 17:58:42,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:42,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390759292] [2021-07-09 17:58:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390759292] [2021-07-09 17:58:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390759292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164257870] [2021-07-09 17:58:42,475 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 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 [2021-07-09 17:58:42,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:42,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:42,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:58:42,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:42,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:42,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:42,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:58:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:42,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164257870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:42,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:42,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:58:42,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290061428] [2021-07-09 17:58:42,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:58:42,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:58:42,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:58:42,848 INFO L87 Difference]: Start difference. First operand 8984 states and 40172 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:44,904 INFO L93 Difference]: Finished difference Result 9957 states and 43886 transitions. [2021-07-09 17:58:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:58:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:44,932 INFO L225 Difference]: With dead ends: 9957 [2021-07-09 17:58:44,932 INFO L226 Difference]: Without dead ends: 9926 [2021-07-09 17:58:44,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1599.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:58:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-07-09 17:58:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9045. [2021-07-09 17:58:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9045 states, 9044 states have (on average 4.472246793454223) internal successors, (40447), 9044 states have internal predecessors, (40447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 40447 transitions. [2021-07-09 17:58:45,112 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 40447 transitions. Word has length 33 [2021-07-09 17:58:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:45,112 INFO L482 AbstractCegarLoop]: Abstraction has 9045 states and 40447 transitions. [2021-07-09 17:58:45,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 40447 transitions. [2021-07-09 17:58:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:45,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:45,130 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, 1, 1, 1] [2021-07-09 17:58:45,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-09 17:58:45,333 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1710865254, now seen corresponding path program 159 times [2021-07-09 17:58:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:45,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911414936] [2021-07-09 17:58:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:45,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911414936] [2021-07-09 17:58:45,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911414936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121142695] [2021-07-09 17:58:45,498 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 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 [2021-07-09 17:58:45,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:58:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:45,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:45,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 17:58:45,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:45,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:45,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:45,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 17:58:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:45,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121142695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:45,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:45,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:58:45,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232040554] [2021-07-09 17:58:45,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:58:45,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:58:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:58:45,850 INFO L87 Difference]: Start difference. First operand 9045 states and 40447 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:47,451 INFO L93 Difference]: Finished difference Result 9702 states and 42878 transitions. [2021-07-09 17:58:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:58:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:47,479 INFO L225 Difference]: With dead ends: 9702 [2021-07-09 17:58:47,479 INFO L226 Difference]: Without dead ends: 9685 [2021-07-09 17:58:47,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1301.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:58:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-07-09 17:58:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 9054. [2021-07-09 17:58:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9054 states, 9053 states have (on average 4.470341323318237) internal successors, (40470), 9053 states have internal predecessors, (40470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9054 states to 9054 states and 40470 transitions. [2021-07-09 17:58:47,665 INFO L78 Accepts]: Start accepts. Automaton has 9054 states and 40470 transitions. Word has length 33 [2021-07-09 17:58:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:47,665 INFO L482 AbstractCegarLoop]: Abstraction has 9054 states and 40470 transitions. [2021-07-09 17:58:47,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9054 states and 40470 transitions. [2021-07-09 17:58:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:47,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:47,683 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, 1, 1, 1] [2021-07-09 17:58:47,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-09 17:58:47,884 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash 811503182, now seen corresponding path program 160 times [2021-07-09 17:58:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:47,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416657056] [2021-07-09 17:58:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:48,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416657056] [2021-07-09 17:58:48,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416657056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575335407] [2021-07-09 17:58:48,129 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 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 [2021-07-09 17:58:48,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:48,278 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 [2021-07-09 17:58:48,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:48,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:48,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:48,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:58:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:48,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575335407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:48,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:48,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:58:48,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302469007] [2021-07-09 17:58:48,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:58:48,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:48,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:58:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:58:48,374 INFO L87 Difference]: Start difference. First operand 9054 states and 40470 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:51,177 INFO L93 Difference]: Finished difference Result 10760 states and 47205 transitions. [2021-07-09 17:58:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:58:51,177 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:51,209 INFO L225 Difference]: With dead ends: 10760 [2021-07-09 17:58:51,209 INFO L226 Difference]: Without dead ends: 10714 [2021-07-09 17:58:51,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2338.7ms TimeCoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:58:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10714 states. [2021-07-09 17:58:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10714 to 9112. [2021-07-09 17:58:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9112 states, 9111 states have (on average 4.47349357918999) internal successors, (40758), 9111 states have internal predecessors, (40758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 40758 transitions. [2021-07-09 17:58:51,412 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 40758 transitions. Word has length 33 [2021-07-09 17:58:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:51,412 INFO L482 AbstractCegarLoop]: Abstraction has 9112 states and 40758 transitions. [2021-07-09 17:58:51,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 40758 transitions. [2021-07-09 17:58:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:51,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:51,430 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, 1, 1, 1] [2021-07-09 17:58:51,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-09 17:58:51,637 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1657478734, now seen corresponding path program 161 times [2021-07-09 17:58:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609110720] [2021-07-09 17:58:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:51,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609110720] [2021-07-09 17:58:51,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609110720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699056638] [2021-07-09 17:58:51,899 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 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 [2021-07-09 17:58:51,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:58:51,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:51,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:51,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:52,045 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 [2021-07-09 17:58:52,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:52,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:52,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:52,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:58:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:52,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699056638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:52,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:52,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:58:52,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379301268] [2021-07-09 17:58:52,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:52,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:52,133 INFO L87 Difference]: Start difference. First operand 9112 states and 40758 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:54,342 INFO L93 Difference]: Finished difference Result 11088 states and 47707 transitions. [2021-07-09 17:58:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:58:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:54,374 INFO L225 Difference]: With dead ends: 11088 [2021-07-09 17:58:54,375 INFO L226 Difference]: Without dead ends: 10991 [2021-07-09 17:58:54,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1926.8ms TimeCoverageRelationStatistics Valid=563, Invalid=2407, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:58:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10991 states. [2021-07-09 17:58:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10991 to 9100. [2021-07-09 17:58:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 4.475546763380591) internal successors, (40723), 9099 states have internal predecessors, (40723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 40723 transitions. [2021-07-09 17:58:54,584 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 40723 transitions. Word has length 33 [2021-07-09 17:58:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:54,584 INFO L482 AbstractCegarLoop]: Abstraction has 9100 states and 40723 transitions. [2021-07-09 17:58:54,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 40723 transitions. [2021-07-09 17:58:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:54,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:54,602 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, 1, 1, 1] [2021-07-09 17:58:54,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:54,802 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash 926824968, now seen corresponding path program 162 times [2021-07-09 17:58:54,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:54,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999457916] [2021-07-09 17:58:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:54,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:54,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999457916] [2021-07-09 17:58:54,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999457916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945010260] [2021-07-09 17:58:54,977 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 [2021-07-09 17:58:55,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:58:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:55,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:55,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:58:55,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:55,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:55,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:55,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:58:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:55,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945010260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:55,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:55,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:58:55,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62797591] [2021-07-09 17:58:55,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:58:55,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:58:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:58:55,382 INFO L87 Difference]: Start difference. First operand 9100 states and 40723 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:56,095 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-07-09 17:58:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:57,186 INFO L93 Difference]: Finished difference Result 9971 states and 44277 transitions. [2021-07-09 17:58:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:58:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:57,218 INFO L225 Difference]: With dead ends: 9971 [2021-07-09 17:58:57,218 INFO L226 Difference]: Without dead ends: 9919 [2021-07-09 17:58:57,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1431.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:58:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2021-07-09 17:58:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 9085. [2021-07-09 17:58:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9085 states, 9084 states have (on average 4.477542932628798) internal successors, (40674), 9084 states have internal predecessors, (40674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9085 states to 9085 states and 40674 transitions. [2021-07-09 17:58:57,409 INFO L78 Accepts]: Start accepts. Automaton has 9085 states and 40674 transitions. Word has length 33 [2021-07-09 17:58:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:57,409 INFO L482 AbstractCegarLoop]: Abstraction has 9085 states and 40674 transitions. [2021-07-09 17:58:57,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9085 states and 40674 transitions. [2021-07-09 17:58:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:58:57,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:57,427 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, 1, 1, 1] [2021-07-09 17:58:57,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-09 17:58:57,628 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1452593824, now seen corresponding path program 163 times [2021-07-09 17:58:57,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:57,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987264857] [2021-07-09 17:58:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:57,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987264857] [2021-07-09 17:58:57,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987264857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:57,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108589444] [2021-07-09 17:58:57,796 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 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 [2021-07-09 17:58:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:57,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:58:57,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:57,967 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 [2021-07-09 17:58:57,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:58:57,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:58:57,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:58:57,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 17:58:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:58,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108589444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:58,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:58,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:58:58,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770033436] [2021-07-09 17:58:58,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:58:58,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:58,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:58:58,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:58:58,041 INFO L87 Difference]: Start difference. First operand 9085 states and 40674 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:58:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:59,823 INFO L93 Difference]: Finished difference Result 10896 states and 47670 transitions. [2021-07-09 17:58:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:58:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:58:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:59,856 INFO L225 Difference]: With dead ends: 10896 [2021-07-09 17:58:59,857 INFO L226 Difference]: Without dead ends: 10834 [2021-07-09 17:58:59,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1313.7ms TimeCoverageRelationStatistics Valid=427, Invalid=2653, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:58:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-07-09 17:59:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 9270. [2021-07-09 17:59:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9270 states, 9269 states have (on average 4.479879167116194) internal successors, (41524), 9269 states have internal predecessors, (41524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9270 states to 9270 states and 41524 transitions. [2021-07-09 17:59:00,059 INFO L78 Accepts]: Start accepts. Automaton has 9270 states and 41524 transitions. Word has length 33 [2021-07-09 17:59:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:00,059 INFO L482 AbstractCegarLoop]: Abstraction has 9270 states and 41524 transitions. [2021-07-09 17:59:00,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9270 states and 41524 transitions. [2021-07-09 17:59:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:00,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:00,078 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, 1, 1, 1] [2021-07-09 17:59:00,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:00,279 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash -149321218, now seen corresponding path program 164 times [2021-07-09 17:59:00,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:00,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759385379] [2021-07-09 17:59:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:00,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759385379] [2021-07-09 17:59:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759385379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696842398] [2021-07-09 17:59:00,434 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 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 [2021-07-09 17:59:00,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:00,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 17:59:00,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:00,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:00,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:00,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 17:59:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:00,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696842398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:00,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:00,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:59:00,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113878395] [2021-07-09 17:59:00,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:59:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:59:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:59:00,788 INFO L87 Difference]: Start difference. First operand 9270 states and 41524 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:02,066 INFO L93 Difference]: Finished difference Result 10145 states and 44797 transitions. [2021-07-09 17:59:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:59:02,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:02,096 INFO L225 Difference]: With dead ends: 10145 [2021-07-09 17:59:02,097 INFO L226 Difference]: Without dead ends: 10128 [2021-07-09 17:59:02,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1088.5ms TimeCoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:59:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10128 states. [2021-07-09 17:59:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10128 to 9270. [2021-07-09 17:59:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9270 states, 9269 states have (on average 4.479123961592405) internal successors, (41517), 9269 states have internal predecessors, (41517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9270 states to 9270 states and 41517 transitions. [2021-07-09 17:59:02,331 INFO L78 Accepts]: Start accepts. Automaton has 9270 states and 41517 transitions. Word has length 33 [2021-07-09 17:59:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:02,331 INFO L482 AbstractCegarLoop]: Abstraction has 9270 states and 41517 transitions. [2021-07-09 17:59:02,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9270 states and 41517 transitions. [2021-07-09 17:59:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:02,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:02,350 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, 1, 1, 1] [2021-07-09 17:59:02,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:02,553 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1048683290, now seen corresponding path program 165 times [2021-07-09 17:59:02,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:02,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815542193] [2021-07-09 17:59:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:02,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815542193] [2021-07-09 17:59:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815542193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038570611] [2021-07-09 17:59:02,795 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 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 [2021-07-09 17:59:02,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:59:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:02,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:59:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:59:02,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:02,986 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 22 treesize of output 30 [2021-07-09 17:59:02,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:02,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:02,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:02,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-07-09 17:59:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038570611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:03,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:03,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:59:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684562992] [2021-07-09 17:59:03,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:59:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:59:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:59:03,140 INFO L87 Difference]: Start difference. First operand 9270 states and 41517 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:03,386 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-09 17:59:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:06,516 INFO L93 Difference]: Finished difference Result 10598 states and 46439 transitions. [2021-07-09 17:59:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:59:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:06,549 INFO L225 Difference]: With dead ends: 10598 [2021-07-09 17:59:06,549 INFO L226 Difference]: Without dead ends: 10552 [2021-07-09 17:59:06,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2856.3ms TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:59:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2021-07-09 17:59:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 9361. [2021-07-09 17:59:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9361 states, 9360 states have (on average 4.479594017094017) internal successors, (41929), 9360 states have internal predecessors, (41929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 41929 transitions. [2021-07-09 17:59:06,758 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 41929 transitions. Word has length 33 [2021-07-09 17:59:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:06,759 INFO L482 AbstractCegarLoop]: Abstraction has 9361 states and 41929 transitions. [2021-07-09 17:59:06,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 41929 transitions. [2021-07-09 17:59:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:06,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:06,779 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, 1, 1, 1] [2021-07-09 17:59:06,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-07-09 17:59:06,979 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:06,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1465685704, now seen corresponding path program 166 times [2021-07-09 17:59:06,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:06,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019034194] [2021-07-09 17:59:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:07,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:07,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019034194] [2021-07-09 17:59:07,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019034194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:07,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793827492] [2021-07-09 17:59:07,226 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 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 [2021-07-09 17:59:07,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:07,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:07,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:07,395 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 28 treesize of output 12 [2021-07-09 17:59:07,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:07,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:07,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:07,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:59:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:07,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793827492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:07,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:07,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:59:07,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532859242] [2021-07-09 17:59:07,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:59:07,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:59:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:59:07,474 INFO L87 Difference]: Start difference. First operand 9361 states and 41929 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:09,828 INFO L93 Difference]: Finished difference Result 11121 states and 48607 transitions. [2021-07-09 17:59:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:59:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:09,860 INFO L225 Difference]: With dead ends: 11121 [2021-07-09 17:59:09,861 INFO L226 Difference]: Without dead ends: 11048 [2021-07-09 17:59:09,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1931.7ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:59:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11048 states. [2021-07-09 17:59:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11048 to 9324. [2021-07-09 17:59:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9324 states, 9323 states have (on average 4.480639279201974) internal successors, (41773), 9323 states have internal predecessors, (41773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9324 states to 9324 states and 41773 transitions. [2021-07-09 17:59:10,065 INFO L78 Accepts]: Start accepts. Automaton has 9324 states and 41773 transitions. Word has length 33 [2021-07-09 17:59:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:10,065 INFO L482 AbstractCegarLoop]: Abstraction has 9324 states and 41773 transitions. [2021-07-09 17:59:10,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9324 states and 41773 transitions. [2021-07-09 17:59:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:10,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:10,084 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, 1, 1, 1] [2021-07-09 17:59:10,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-09 17:59:10,285 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash -933361504, now seen corresponding path program 167 times [2021-07-09 17:59:10,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:10,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352096681] [2021-07-09 17:59:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:10,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352096681] [2021-07-09 17:59:10,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352096681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268564810] [2021-07-09 17:59:10,457 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 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 [2021-07-09 17:59:10,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:59:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:10,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:10,646 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 28 treesize of output 12 [2021-07-09 17:59:10,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:10,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:10,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:10,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:59:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268564810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:10,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:10,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:59:10,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101023298] [2021-07-09 17:59:10,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:10,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:10,723 INFO L87 Difference]: Start difference. First operand 9324 states and 41773 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:12,478 INFO L93 Difference]: Finished difference Result 10619 states and 46840 transitions. [2021-07-09 17:59:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:59:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:12,508 INFO L225 Difference]: With dead ends: 10619 [2021-07-09 17:59:12,509 INFO L226 Difference]: Without dead ends: 10527 [2021-07-09 17:59:12,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1347.4ms TimeCoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:59:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-07-09 17:59:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 9312. [2021-07-09 17:59:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9312 states, 9311 states have (on average 4.4805069272903015) internal successors, (41718), 9311 states have internal predecessors, (41718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9312 states to 9312 states and 41718 transitions. [2021-07-09 17:59:12,706 INFO L78 Accepts]: Start accepts. Automaton has 9312 states and 41718 transitions. Word has length 33 [2021-07-09 17:59:12,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:12,706 INFO L482 AbstractCegarLoop]: Abstraction has 9312 states and 41718 transitions. [2021-07-09 17:59:12,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9312 states and 41718 transitions. [2021-07-09 17:59:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:12,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:12,725 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, 1, 1, 1] [2021-07-09 17:59:12,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-09 17:59:12,925 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1177278074, now seen corresponding path program 168 times [2021-07-09 17:59:12,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:12,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075636997] [2021-07-09 17:59:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:13,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:13,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075636997] [2021-07-09 17:59:13,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075636997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:13,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782344490] [2021-07-09 17:59:13,095 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 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 [2021-07-09 17:59:13,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:59:13,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:13,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:13,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:13,391 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:59:13,391 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 33 treesize of output 61 [2021-07-09 17:59:13,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:59:13,438 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-07-09 17:59:13,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:13,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-09 17:59:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:13,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782344490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:13,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:13,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:59:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843316911] [2021-07-09 17:59:13,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:59:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:59:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:59:13,526 INFO L87 Difference]: Start difference. First operand 9312 states and 41718 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:14,993 INFO L93 Difference]: Finished difference Result 10057 states and 44611 transitions. [2021-07-09 17:59:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:59:14,994 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:15,024 INFO L225 Difference]: With dead ends: 10057 [2021-07-09 17:59:15,024 INFO L226 Difference]: Without dead ends: 10003 [2021-07-09 17:59:15,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1172.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:59:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-07-09 17:59:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 9297. [2021-07-09 17:59:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 4.48171256454389) internal successors, (41662), 9296 states have internal predecessors, (41662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 41662 transitions. [2021-07-09 17:59:15,215 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 41662 transitions. Word has length 33 [2021-07-09 17:59:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:15,215 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 41662 transitions. [2021-07-09 17:59:15,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 41662 transitions. [2021-07-09 17:59:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:15,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:15,233 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, 1, 1, 1] [2021-07-09 17:59:15,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-09 17:59:15,437 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1294173688, now seen corresponding path program 169 times [2021-07-09 17:59:15,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:15,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161826442] [2021-07-09 17:59:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:15,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161826442] [2021-07-09 17:59:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161826442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035649123] [2021-07-09 17:59:15,609 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 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 [2021-07-09 17:59:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:15,788 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 28 treesize of output 12 [2021-07-09 17:59:15,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:15,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:15,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:15,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:59:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:15,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035649123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:15,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:15,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:59:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905926934] [2021-07-09 17:59:15,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:15,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:15,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:15,862 INFO L87 Difference]: Start difference. First operand 9297 states and 41662 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:17,851 INFO L93 Difference]: Finished difference Result 11538 states and 50533 transitions. [2021-07-09 17:59:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:59:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:17,886 INFO L225 Difference]: With dead ends: 11538 [2021-07-09 17:59:17,887 INFO L226 Difference]: Without dead ends: 11500 [2021-07-09 17:59:17,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1382.2ms TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:59:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-07-09 17:59:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 9442. [2021-07-09 17:59:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9441 states have (on average 4.487766126469654) internal successors, (42369), 9441 states have internal predecessors, (42369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 42369 transitions. [2021-07-09 17:59:18,109 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 42369 transitions. Word has length 33 [2021-07-09 17:59:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:18,109 INFO L482 AbstractCegarLoop]: Abstraction has 9442 states and 42369 transitions. [2021-07-09 17:59:18,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 42369 transitions. [2021-07-09 17:59:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:18,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:18,127 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, 1, 1, 1] [2021-07-09 17:59:18,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-09 17:59:18,328 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash 9098918, now seen corresponding path program 170 times [2021-07-09 17:59:18,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:18,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984200460] [2021-07-09 17:59:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:18,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:18,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984200460] [2021-07-09 17:59:18,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984200460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:18,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795887468] [2021-07-09 17:59:18,481 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 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 [2021-07-09 17:59:18,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:18,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:59:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:18,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:18,664 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 24 treesize of output 30 [2021-07-09 17:59:18,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:18,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:18,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:18,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-09 17:59:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795887468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:18,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:59:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199840760] [2021-07-09 17:59:18,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:59:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:59:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:59:18,829 INFO L87 Difference]: Start difference. First operand 9442 states and 42369 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:19,982 INFO L93 Difference]: Finished difference Result 10301 states and 45730 transitions. [2021-07-09 17:59:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:59:19,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:20,012 INFO L225 Difference]: With dead ends: 10301 [2021-07-09 17:59:20,013 INFO L226 Difference]: Without dead ends: 10288 [2021-07-09 17:59:20,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 767.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:59:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10288 states. [2021-07-09 17:59:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10288 to 9442. [2021-07-09 17:59:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9441 states have (on average 4.487448363520813) internal successors, (42366), 9441 states have internal predecessors, (42366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 42366 transitions. [2021-07-09 17:59:20,251 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 42366 transitions. Word has length 33 [2021-07-09 17:59:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:20,252 INFO L482 AbstractCegarLoop]: Abstraction has 9442 states and 42366 transitions. [2021-07-09 17:59:20,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 42366 transitions. [2021-07-09 17:59:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:20,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:20,270 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, 1, 1, 1] [2021-07-09 17:59:20,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable350 [2021-07-09 17:59:20,471 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash -890263154, now seen corresponding path program 171 times [2021-07-09 17:59:20,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:20,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385390275] [2021-07-09 17:59:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:20,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385390275] [2021-07-09 17:59:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385390275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173163477] [2021-07-09 17:59:20,640 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 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 [2021-07-09 17:59:20,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:59:20,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:20,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:59:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:20,871 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:59:20,872 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 27 treesize of output 55 [2021-07-09 17:59:20,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:59:20,903 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-09 17:59:20,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:20,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 17:59:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:21,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173163477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:21,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:21,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:59:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487432700] [2021-07-09 17:59:21,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:59:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:59:21,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:59:21,038 INFO L87 Difference]: Start difference. First operand 9442 states and 42366 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:22,723 INFO L93 Difference]: Finished difference Result 10776 states and 47511 transitions. [2021-07-09 17:59:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:59:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:22,755 INFO L225 Difference]: With dead ends: 10776 [2021-07-09 17:59:22,755 INFO L226 Difference]: Without dead ends: 10740 [2021-07-09 17:59:22,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1142.9ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:59:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10740 states. [2021-07-09 17:59:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10740 to 9444. [2021-07-09 17:59:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9444 states, 9443 states have (on average 4.491157471142645) internal successors, (42410), 9443 states have internal predecessors, (42410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9444 states to 9444 states and 42410 transitions. [2021-07-09 17:59:23,017 INFO L78 Accepts]: Start accepts. Automaton has 9444 states and 42410 transitions. Word has length 33 [2021-07-09 17:59:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:23,017 INFO L482 AbstractCegarLoop]: Abstraction has 9444 states and 42410 transitions. [2021-07-09 17:59:23,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9444 states and 42410 transitions. [2021-07-09 17:59:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:23,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:23,036 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, 1, 1, 1] [2021-07-09 17:59:23,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:23,236 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2018541494, now seen corresponding path program 172 times [2021-07-09 17:59:23,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:23,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811731292] [2021-07-09 17:59:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:23,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:23,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811731292] [2021-07-09 17:59:23,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811731292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:23,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353187712] [2021-07-09 17:59:23,410 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 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 [2021-07-09 17:59:23,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:23,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:23,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:23,613 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 28 treesize of output 12 [2021-07-09 17:59:23,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:23,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:23,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:23,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 17:59:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:23,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353187712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:23,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:23,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:59:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637056680] [2021-07-09 17:59:23,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:59:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:59:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:59:23,706 INFO L87 Difference]: Start difference. First operand 9444 states and 42410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:25,464 INFO L93 Difference]: Finished difference Result 11277 states and 49500 transitions. [2021-07-09 17:59:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:59:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:25,499 INFO L225 Difference]: With dead ends: 11277 [2021-07-09 17:59:25,499 INFO L226 Difference]: Without dead ends: 11228 [2021-07-09 17:59:25,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1179.2ms TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:59:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11228 states. [2021-07-09 17:59:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11228 to 9432. [2021-07-09 17:59:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 4.4919944862686885) internal successors, (42364), 9431 states have internal predecessors, (42364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 42364 transitions. [2021-07-09 17:59:25,770 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 42364 transitions. Word has length 33 [2021-07-09 17:59:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:25,770 INFO L482 AbstractCegarLoop]: Abstraction has 9432 states and 42364 transitions. [2021-07-09 17:59:25,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 42364 transitions. [2021-07-09 17:59:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:25,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:25,788 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, 1, 1, 1] [2021-07-09 17:59:25,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-09 17:59:25,989 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash -200970036, now seen corresponding path program 173 times [2021-07-09 17:59:25,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:25,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958540073] [2021-07-09 17:59:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:26,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:26,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958540073] [2021-07-09 17:59:26,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958540073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:26,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804421386] [2021-07-09 17:59:26,157 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 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 [2021-07-09 17:59:26,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:59:26,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:26,377 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 28 treesize of output 12 [2021-07-09 17:59:26,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:26,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:26,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:26,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-09 17:59:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:26,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804421386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:26,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:26,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:59:26,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399484123] [2021-07-09 17:59:26,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:59:26,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:59:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:59:26,437 INFO L87 Difference]: Start difference. First operand 9432 states and 42364 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:27,623 INFO L93 Difference]: Finished difference Result 10344 states and 46104 transitions. [2021-07-09 17:59:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:59:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:27,653 INFO L225 Difference]: With dead ends: 10344 [2021-07-09 17:59:27,653 INFO L226 Difference]: Without dead ends: 10329 [2021-07-09 17:59:27,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 855.1ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:59:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2021-07-09 17:59:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 9417. [2021-07-09 17:59:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 4.492353440951572) internal successors, (42300), 9416 states have internal predecessors, (42300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 42300 transitions. [2021-07-09 17:59:27,839 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 42300 transitions. Word has length 33 [2021-07-09 17:59:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:27,839 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 42300 transitions. [2021-07-09 17:59:27,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 42300 transitions. [2021-07-09 17:59:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:27,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:27,857 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, 1, 1, 1] [2021-07-09 17:59:28,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-07-09 17:59:28,061 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash 655113932, now seen corresponding path program 174 times [2021-07-09 17:59:28,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691144474] [2021-07-09 17:59:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:28,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:28,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691144474] [2021-07-09 17:59:28,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691144474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:28,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872986055] [2021-07-09 17:59:28,234 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 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 [2021-07-09 17:59:28,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:59:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:28,506 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:59:28,506 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 29 treesize of output 57 [2021-07-09 17:59:28,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:28,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:28,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:28,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 17:59:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872986055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:28,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:28,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:59:28,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440026208] [2021-07-09 17:59:28,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:59:28,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:59:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:59:28,713 INFO L87 Difference]: Start difference. First operand 9417 states and 42300 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:30,557 INFO L93 Difference]: Finished difference Result 10450 states and 46386 transitions. [2021-07-09 17:59:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:59:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:30,588 INFO L225 Difference]: With dead ends: 10450 [2021-07-09 17:59:30,588 INFO L226 Difference]: Without dead ends: 10419 [2021-07-09 17:59:30,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1450.4ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:59:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-07-09 17:59:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 9499. [2021-07-09 17:59:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 4.49273531269741) internal successors, (42672), 9498 states have internal predecessors, (42672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 42672 transitions. [2021-07-09 17:59:30,791 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 42672 transitions. Word has length 33 [2021-07-09 17:59:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:30,791 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 42672 transitions. [2021-07-09 17:59:30,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 42672 transitions. [2021-07-09 17:59:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:30,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:30,809 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, 1, 1, 1] [2021-07-09 17:59:31,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-07-09 17:59:31,010 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1958386538, now seen corresponding path program 175 times [2021-07-09 17:59:31,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:31,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521088250] [2021-07-09 17:59:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:31,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:31,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521088250] [2021-07-09 17:59:31,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521088250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:31,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919689246] [2021-07-09 17:59:31,238 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 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 [2021-07-09 17:59:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:31,390 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 [2021-07-09 17:59:31,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:31,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:31,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:31,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:59:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:31,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919689246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:31,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:31,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:59:31,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129599473] [2021-07-09 17:59:31,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:31,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:31,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:31,484 INFO L87 Difference]: Start difference. First operand 9499 states and 42672 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:32,734 INFO L93 Difference]: Finished difference Result 10963 states and 48287 transitions. [2021-07-09 17:59:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:59:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:32,766 INFO L225 Difference]: With dead ends: 10963 [2021-07-09 17:59:32,766 INFO L226 Difference]: Without dead ends: 10935 [2021-07-09 17:59:32,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 950.0ms TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:59:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10935 states. [2021-07-09 17:59:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10935 to 9630. [2021-07-09 17:59:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9630 states, 9629 states have (on average 4.4952746910374906) internal successors, (43285), 9629 states have internal predecessors, (43285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9630 states to 9630 states and 43285 transitions. [2021-07-09 17:59:32,987 INFO L78 Accepts]: Start accepts. Automaton has 9630 states and 43285 transitions. Word has length 33 [2021-07-09 17:59:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:32,987 INFO L482 AbstractCegarLoop]: Abstraction has 9630 states and 43285 transitions. [2021-07-09 17:59:32,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 9630 states and 43285 transitions. [2021-07-09 17:59:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:33,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:33,007 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, 1, 1, 1] [2021-07-09 17:59:33,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:33,207 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:33,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1905000018, now seen corresponding path program 176 times [2021-07-09 17:59:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:33,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573632677] [2021-07-09 17:59:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:33,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:33,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573632677] [2021-07-09 17:59:33,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573632677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:33,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829755077] [2021-07-09 17:59:33,374 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 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 [2021-07-09 17:59:33,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:33,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:33,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:33,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:59:33,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:33,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:33,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:33,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:59:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:33,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829755077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:33,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:33,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:59:33,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470881108] [2021-07-09 17:59:33,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:59:33,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:59:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:59:33,781 INFO L87 Difference]: Start difference. First operand 9630 states and 43285 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:34,158 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-07-09 17:59:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:35,573 INFO L93 Difference]: Finished difference Result 10286 states and 45812 transitions. [2021-07-09 17:59:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:59:35,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:35,603 INFO L225 Difference]: With dead ends: 10286 [2021-07-09 17:59:35,604 INFO L226 Difference]: Without dead ends: 10263 [2021-07-09 17:59:35,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1619.6ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:59:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-07-09 17:59:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 9590. [2021-07-09 17:59:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.497340702888726) internal successors, (43125), 9589 states have internal predecessors, (43125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43125 transitions. [2021-07-09 17:59:35,799 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43125 transitions. Word has length 33 [2021-07-09 17:59:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:35,799 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43125 transitions. [2021-07-09 17:59:35,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43125 transitions. [2021-07-09 17:59:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:35,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:35,819 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, 1, 1, 1] [2021-07-09 17:59:36,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:36,020 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash -327138182, now seen corresponding path program 177 times [2021-07-09 17:59:36,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:36,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124345683] [2021-07-09 17:59:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:36,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124345683] [2021-07-09 17:59:36,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124345683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:36,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185015502] [2021-07-09 17:59:36,196 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 [2021-07-09 17:59:36,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:59:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:36,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:59:36,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:36,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:36,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:36,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:59:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:36,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185015502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:36,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:36,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:59:36,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417136584] [2021-07-09 17:59:36,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:59:36,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:36,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:59:36,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:59:36,658 INFO L87 Difference]: Start difference. First operand 9590 states and 43125 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:38,052 INFO L93 Difference]: Finished difference Result 10184 states and 45537 transitions. [2021-07-09 17:59:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:59:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:38,083 INFO L225 Difference]: With dead ends: 10184 [2021-07-09 17:59:38,083 INFO L226 Difference]: Without dead ends: 10169 [2021-07-09 17:59:38,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1219.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:59:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10169 states. [2021-07-09 17:59:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10169 to 9590. [2021-07-09 17:59:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.497340702888726) internal successors, (43125), 9589 states have internal predecessors, (43125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43125 transitions. [2021-07-09 17:59:38,285 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43125 transitions. Word has length 33 [2021-07-09 17:59:38,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:38,285 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43125 transitions. [2021-07-09 17:59:38,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43125 transitions. [2021-07-09 17:59:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:38,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:38,305 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, 1, 1, 1] [2021-07-09 17:59:38,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-07-09 17:59:38,506 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1757454616, now seen corresponding path program 178 times [2021-07-09 17:59:38,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:38,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791574873] [2021-07-09 17:59:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:38,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:38,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791574873] [2021-07-09 17:59:38,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791574873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:38,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126024502] [2021-07-09 17:59:38,669 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 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 [2021-07-09 17:59:38,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:38,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:38,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:38,820 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 [2021-07-09 17:59:38,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:38,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:38,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:38,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:59:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:38,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126024502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:38,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:38,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 17:59:38,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055139775] [2021-07-09 17:59:38,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:59:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:59:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:59:38,968 INFO L87 Difference]: Start difference. First operand 9590 states and 43125 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:40,327 INFO L93 Difference]: Finished difference Result 10656 states and 47208 transitions. [2021-07-09 17:59:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:59:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:40,360 INFO L225 Difference]: With dead ends: 10656 [2021-07-09 17:59:40,361 INFO L226 Difference]: Without dead ends: 10632 [2021-07-09 17:59:40,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1053.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:59:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2021-07-09 17:59:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 9575. [2021-07-09 17:59:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9575 states, 9574 states have (on average 4.498537706287863) internal successors, (43069), 9574 states have internal predecessors, (43069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9575 states to 9575 states and 43069 transitions. [2021-07-09 17:59:40,569 INFO L78 Accepts]: Start accepts. Automaton has 9575 states and 43069 transitions. Word has length 33 [2021-07-09 17:59:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:40,569 INFO L482 AbstractCegarLoop]: Abstraction has 9575 states and 43069 transitions. [2021-07-09 17:59:40,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9575 states and 43069 transitions. [2021-07-09 17:59:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:40,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:40,588 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, 1, 1, 1] [2021-07-09 17:59:40,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 17:59:40,788 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -72637978, now seen corresponding path program 179 times [2021-07-09 17:59:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:40,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743224440] [2021-07-09 17:59:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:40,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:40,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743224440] [2021-07-09 17:59:40,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743224440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:40,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127537195] [2021-07-09 17:59:40,950 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 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 [2021-07-09 17:59:40,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:59:40,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:41,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 17:59:41,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:41,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:41,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:41,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:59:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:41,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127537195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:41,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:41,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 17:59:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812146625] [2021-07-09 17:59:41,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:41,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:41,197 INFO L87 Difference]: Start difference. First operand 9575 states and 43069 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:42,262 INFO L93 Difference]: Finished difference Result 10707 states and 47282 transitions. [2021-07-09 17:59:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:59:42,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:42,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:42,293 INFO L225 Difference]: With dead ends: 10707 [2021-07-09 17:59:42,294 INFO L226 Difference]: Without dead ends: 10685 [2021-07-09 17:59:42,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:59:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2021-07-09 17:59:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 9623. [2021-07-09 17:59:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.498960715028061) internal successors, (43289), 9622 states have internal predecessors, (43289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 43289 transitions. [2021-07-09 17:59:42,505 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 43289 transitions. Word has length 33 [2021-07-09 17:59:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:42,505 INFO L482 AbstractCegarLoop]: Abstraction has 9623 states and 43289 transitions. [2021-07-09 17:59:42,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 43289 transitions. [2021-07-09 17:59:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:42,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:42,524 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, 1, 1, 1] [2021-07-09 17:59:42,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:42,726 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash -126024498, now seen corresponding path program 180 times [2021-07-09 17:59:42,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:42,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034994139] [2021-07-09 17:59:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:42,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034994139] [2021-07-09 17:59:42,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034994139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084904042] [2021-07-09 17:59:42,887 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 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 [2021-07-09 17:59:42,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:59:42,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:43,079 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 17:59:43,079 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 29 treesize of output 57 [2021-07-09 17:59:43,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:43,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:43,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:43,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 17:59:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:43,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084904042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:43,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:43,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:59:43,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432444037] [2021-07-09 17:59:43,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:59:43,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:59:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:59:43,281 INFO L87 Difference]: Start difference. First operand 9623 states and 43289 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:44,812 INFO L93 Difference]: Finished difference Result 10459 states and 46480 transitions. [2021-07-09 17:59:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:59:44,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:44,843 INFO L225 Difference]: With dead ends: 10459 [2021-07-09 17:59:44,843 INFO L226 Difference]: Without dead ends: 10432 [2021-07-09 17:59:44,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1195.1ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:59:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2021-07-09 17:59:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 9599. [2021-07-09 17:59:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9599 states, 9598 states have (on average 4.503542404667639) internal successors, (43225), 9598 states have internal predecessors, (43225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9599 states to 9599 states and 43225 transitions. [2021-07-09 17:59:45,038 INFO L78 Accepts]: Start accepts. Automaton has 9599 states and 43225 transitions. Word has length 33 [2021-07-09 17:59:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:45,038 INFO L482 AbstractCegarLoop]: Abstraction has 9599 states and 43225 transitions. [2021-07-09 17:59:45,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 9599 states and 43225 transitions. [2021-07-09 17:59:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:45,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:45,057 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, 1, 1, 1] [2021-07-09 17:59:45,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-07-09 17:59:45,257 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1420275688, now seen corresponding path program 181 times [2021-07-09 17:59:45,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:45,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740257718] [2021-07-09 17:59:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:45,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740257718] [2021-07-09 17:59:45,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740257718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829817839] [2021-07-09 17:59:45,436 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 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 [2021-07-09 17:59:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:45,596 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 29 treesize of output 13 [2021-07-09 17:59:45,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:45,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:45,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:45,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:59:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:45,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829817839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:45,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:45,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:59:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525537002] [2021-07-09 17:59:45,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:45,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:45,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:45,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:45,686 INFO L87 Difference]: Start difference. First operand 9599 states and 43225 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:47,153 INFO L93 Difference]: Finished difference Result 10782 states and 47731 transitions. [2021-07-09 17:59:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:59:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:47,185 INFO L225 Difference]: With dead ends: 10782 [2021-07-09 17:59:47,185 INFO L226 Difference]: Without dead ends: 10740 [2021-07-09 17:59:47,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1204.2ms TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:59:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10740 states. [2021-07-09 17:59:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10740 to 9590. [2021-07-09 17:59:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.503702158723537) internal successors, (43186), 9589 states have internal predecessors, (43186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43186 transitions. [2021-07-09 17:59:47,391 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43186 transitions. Word has length 33 [2021-07-09 17:59:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:47,391 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43186 transitions. [2021-07-09 17:59:47,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43186 transitions. [2021-07-09 17:59:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:47,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:47,410 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, 1, 1, 1] [2021-07-09 17:59:47,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:47,610 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1328692334, now seen corresponding path program 182 times [2021-07-09 17:59:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:47,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347414317] [2021-07-09 17:59:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:47,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:47,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347414317] [2021-07-09 17:59:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347414317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:47,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802542363] [2021-07-09 17:59:47,782 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 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 [2021-07-09 17:59:47,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:47,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:47,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:47,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:47,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:59:47,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:47,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:47,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:47,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:59:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802542363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:48,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:48,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 17:59:48,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137852686] [2021-07-09 17:59:48,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:59:48,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:59:48,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:59:48,157 INFO L87 Difference]: Start difference. First operand 9590 states and 43186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:50,190 INFO L93 Difference]: Finished difference Result 10527 states and 46863 transitions. [2021-07-09 17:59:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:59:50,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:50,221 INFO L225 Difference]: With dead ends: 10527 [2021-07-09 17:59:50,221 INFO L226 Difference]: Without dead ends: 10496 [2021-07-09 17:59:50,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1718.6ms TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:59:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10496 states. [2021-07-09 17:59:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10496 to 9618. [2021-07-09 17:59:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9618 states, 9617 states have (on average 4.507226785899968) internal successors, (43346), 9617 states have internal predecessors, (43346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9618 states to 9618 states and 43346 transitions. [2021-07-09 17:59:50,422 INFO L78 Accepts]: Start accepts. Automaton has 9618 states and 43346 transitions. Word has length 33 [2021-07-09 17:59:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:50,422 INFO L482 AbstractCegarLoop]: Abstraction has 9618 states and 43346 transitions. [2021-07-09 17:59:50,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 9618 states and 43346 transitions. [2021-07-09 17:59:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:50,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:50,442 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, 1, 1, 1] [2021-07-09 17:59:50,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2021-07-09 17:59:50,644 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:50,644 INFO L82 PathProgramCache]: Analyzing trace with hash -25419728, now seen corresponding path program 183 times [2021-07-09 17:59:50,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:50,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654557846] [2021-07-09 17:59:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:50,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:50,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654557846] [2021-07-09 17:59:50,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654557846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:50,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652436262] [2021-07-09 17:59:50,802 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 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 [2021-07-09 17:59:50,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:59:50,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:50,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:50,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:50,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 17:59:50,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:50,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:50,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:50,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 17:59:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:51,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652436262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:51,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:51,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 17:59:51,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092173922] [2021-07-09 17:59:51,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:59:51,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:59:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:59:51,149 INFO L87 Difference]: Start difference. First operand 9618 states and 43346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:52,814 INFO L93 Difference]: Finished difference Result 10272 states and 45855 transitions. [2021-07-09 17:59:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:59:52,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:52,844 INFO L225 Difference]: With dead ends: 10272 [2021-07-09 17:59:52,844 INFO L226 Difference]: Without dead ends: 10255 [2021-07-09 17:59:52,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1425.0ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:59:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-07-09 17:59:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 9660. [2021-07-09 17:59:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9660 states, 9659 states have (on average 4.5019153121441144) internal successors, (43484), 9659 states have internal predecessors, (43484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9660 states to 9660 states and 43484 transitions. [2021-07-09 17:59:53,048 INFO L78 Accepts]: Start accepts. Automaton has 9660 states and 43484 transitions. Word has length 33 [2021-07-09 17:59:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:53,049 INFO L482 AbstractCegarLoop]: Abstraction has 9660 states and 43484 transitions. [2021-07-09 17:59:53,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9660 states and 43484 transitions. [2021-07-09 17:59:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:53,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:53,070 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, 1, 1, 1] [2021-07-09 17:59:53,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-09 17:59:53,270 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash -924781800, now seen corresponding path program 184 times [2021-07-09 17:59:53,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:53,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379906710] [2021-07-09 17:59:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:53,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:53,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379906710] [2021-07-09 17:59:53,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379906710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:53,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820048177] [2021-07-09 17:59:53,514 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 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 [2021-07-09 17:59:53,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:53,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:53,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 17:59:53,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 17:59:53,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:53,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:53,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:53,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 17:59:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:53,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820048177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:53,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:53,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:59:53,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402492449] [2021-07-09 17:59:53,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:59:53,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:53,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:59:53,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:59:53,759 INFO L87 Difference]: Start difference. First operand 9660 states and 43484 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:56,824 INFO L93 Difference]: Finished difference Result 11445 states and 50459 transitions. [2021-07-09 17:59:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:59:56,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 17:59:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:56,858 INFO L225 Difference]: With dead ends: 11445 [2021-07-09 17:59:56,859 INFO L226 Difference]: Without dead ends: 11399 [2021-07-09 17:59:56,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2687.6ms TimeCoverageRelationStatistics Valid=746, Invalid=3946, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:59:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-07-09 17:59:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 9757. [2021-07-09 17:59:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 4.504612546125461) internal successors, (43947), 9756 states have internal predecessors, (43947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 43947 transitions. [2021-07-09 17:59:57,079 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 43947 transitions. Word has length 33 [2021-07-09 17:59:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:57,079 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 43947 transitions. [2021-07-09 17:59:57,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:59:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 43947 transitions. [2021-07-09 17:59:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:59:57,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:57,098 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, 1, 1, 1] [2021-07-09 17:59:57,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 17:59:57,299 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash -78806248, now seen corresponding path program 185 times [2021-07-09 17:59:57,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:57,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774299896] [2021-07-09 17:59:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:57,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:57,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774299896] [2021-07-09 17:59:57,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774299896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:57,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013906068] [2021-07-09 17:59:57,539 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 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 [2021-07-09 17:59:57,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:59:57,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:57,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:59:57,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:57,683 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 [2021-07-09 17:59:57,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:59:57,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:59:57,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:59:57,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 17:59:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:57,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013906068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:57,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:57,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 17:59:57,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056149836] [2021-07-09 17:59:57,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:59:57,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:57,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:59:57,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:59:57,772 INFO L87 Difference]: Start difference. First operand 9757 states and 43947 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:00,165 INFO L93 Difference]: Finished difference Result 11662 states and 50636 transitions. [2021-07-09 18:00:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:00:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:00,198 INFO L225 Difference]: With dead ends: 11662 [2021-07-09 18:00:00,199 INFO L226 Difference]: Without dead ends: 11601 [2021-07-09 18:00:00,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2112.5ms TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:00:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11601 states. [2021-07-09 18:00:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11601 to 9692. [2021-07-09 18:00:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9692 states, 9691 states have (on average 4.504591889381901) internal successors, (43654), 9691 states have internal predecessors, (43654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9692 states to 9692 states and 43654 transitions. [2021-07-09 18:00:00,425 INFO L78 Accepts]: Start accepts. Automaton has 9692 states and 43654 transitions. Word has length 33 [2021-07-09 18:00:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:00,425 INFO L482 AbstractCegarLoop]: Abstraction has 9692 states and 43654 transitions. [2021-07-09 18:00:00,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9692 states and 43654 transitions. [2021-07-09 18:00:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:00,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:00,446 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, 1, 1, 1] [2021-07-09 18:00:00,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 18:00:00,646 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1984022848, now seen corresponding path program 186 times [2021-07-09 18:00:00,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:00,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530626193] [2021-07-09 18:00:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:00,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530626193] [2021-07-09 18:00:00,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530626193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971159188] [2021-07-09 18:00:00,939 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 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 [2021-07-09 18:00:00,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:00,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:01,133 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:00:01,133 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 29 treesize of output 57 [2021-07-09 18:00:01,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:01,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:01,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:01,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 18:00:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971159188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:01,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:01,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:00:01,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918577691] [2021-07-09 18:00:01,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:00:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:00:01,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:00:01,365 INFO L87 Difference]: Start difference. First operand 9692 states and 43654 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:03,273 INFO L93 Difference]: Finished difference Result 10771 states and 47275 transitions. [2021-07-09 18:00:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:00:03,273 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:03,305 INFO L225 Difference]: With dead ends: 10771 [2021-07-09 18:00:03,305 INFO L226 Difference]: Without dead ends: 10701 [2021-07-09 18:00:03,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1875.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:00:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10701 states. [2021-07-09 18:00:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10701 to 9677. [2021-07-09 18:00:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9677 states, 9676 states have (on average 4.506510954940058) internal successors, (43605), 9676 states have internal predecessors, (43605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9677 states to 9677 states and 43605 transitions. [2021-07-09 18:00:03,605 INFO L78 Accepts]: Start accepts. Automaton has 9677 states and 43605 transitions. Word has length 33 [2021-07-09 18:00:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:03,605 INFO L482 AbstractCegarLoop]: Abstraction has 9677 states and 43605 transitions. [2021-07-09 18:00:03,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9677 states and 43605 transitions. [2021-07-09 18:00:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:03,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:03,626 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, 1, 1, 1] [2021-07-09 18:00:03,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-07-09 18:00:03,826 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash 935250446, now seen corresponding path program 187 times [2021-07-09 18:00:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:03,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67881651] [2021-07-09 18:00:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67881651] [2021-07-09 18:00:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67881651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40517715] [2021-07-09 18:00:04,004 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 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 [2021-07-09 18:00:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:04,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:00:04,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:04,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:04,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:04,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:00:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:04,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40517715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:04,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:04,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:00:04,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187680293] [2021-07-09 18:00:04,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:04,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:04,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:04,248 INFO L87 Difference]: Start difference. First operand 9677 states and 43605 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:05,636 INFO L93 Difference]: Finished difference Result 10880 states and 48121 transitions. [2021-07-09 18:00:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:00:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:05,667 INFO L225 Difference]: With dead ends: 10880 [2021-07-09 18:00:05,667 INFO L226 Difference]: Without dead ends: 10778 [2021-07-09 18:00:05,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1194.9ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:00:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-07-09 18:00:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 9688. [2021-07-09 18:00:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9687 states have (on average 4.512439351708475) internal successors, (43712), 9687 states have internal predecessors, (43712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 43712 transitions. [2021-07-09 18:00:05,863 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 43712 transitions. Word has length 33 [2021-07-09 18:00:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:05,863 INFO L482 AbstractCegarLoop]: Abstraction has 9688 states and 43712 transitions. [2021-07-09 18:00:05,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 43712 transitions. [2021-07-09 18:00:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:05,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:05,881 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, 1, 1, 1] [2021-07-09 18:00:06,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:06,082 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1454482766, now seen corresponding path program 188 times [2021-07-09 18:00:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:06,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728019100] [2021-07-09 18:00:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:06,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:06,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728019100] [2021-07-09 18:00:06,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728019100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:06,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725211924] [2021-07-09 18:00:06,328 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 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 [2021-07-09 18:00:06,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:06,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:06,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:06,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:06,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:00:06,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:06,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:06,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:06,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:00:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:06,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725211924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:06,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:06,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:00:06,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972339200] [2021-07-09 18:00:06,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:00:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:00:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:00:06,711 INFO L87 Difference]: Start difference. First operand 9688 states and 43712 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:08,197 INFO L93 Difference]: Finished difference Result 10543 states and 47197 transitions. [2021-07-09 18:00:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:00:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:08,227 INFO L225 Difference]: With dead ends: 10543 [2021-07-09 18:00:08,228 INFO L226 Difference]: Without dead ends: 10503 [2021-07-09 18:00:08,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1346.7ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:00:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10503 states. [2021-07-09 18:00:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10503 to 9691. [2021-07-09 18:00:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9691 states, 9690 states have (on average 4.511661506707946) internal successors, (43718), 9690 states have internal predecessors, (43718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 43718 transitions. [2021-07-09 18:00:08,429 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 43718 transitions. Word has length 33 [2021-07-09 18:00:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:08,430 INFO L482 AbstractCegarLoop]: Abstraction has 9691 states and 43718 transitions. [2021-07-09 18:00:08,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 43718 transitions. [2021-07-09 18:00:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:08,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:08,450 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, 1, 1, 1] [2021-07-09 18:00:08,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:08,650 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 519660336, now seen corresponding path program 189 times [2021-07-09 18:00:08,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:08,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126567769] [2021-07-09 18:00:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:08,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:08,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126567769] [2021-07-09 18:00:08,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126567769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:08,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382545280] [2021-07-09 18:00:08,880 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 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 [2021-07-09 18:00:08,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:00:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:09,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:09,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:00:09,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:09,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:09,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:09,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:00:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:09,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382545280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:09,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:09,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:00:09,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487287212] [2021-07-09 18:00:09,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:00:09,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:00:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:00:09,220 INFO L87 Difference]: Start difference. First operand 9691 states and 43718 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:10,370 INFO L93 Difference]: Finished difference Result 10141 states and 45503 transitions. [2021-07-09 18:00:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:00:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:10,403 INFO L225 Difference]: With dead ends: 10141 [2021-07-09 18:00:10,403 INFO L226 Difference]: Without dead ends: 10112 [2021-07-09 18:00:10,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1049.6ms TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:00:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2021-07-09 18:00:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 9676. [2021-07-09 18:00:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9676 states, 9675 states have (on average 4.51359173126615) internal successors, (43669), 9675 states have internal predecessors, (43669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9676 states to 9676 states and 43669 transitions. [2021-07-09 18:00:10,617 INFO L78 Accepts]: Start accepts. Automaton has 9676 states and 43669 transitions. Word has length 33 [2021-07-09 18:00:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:10,617 INFO L482 AbstractCegarLoop]: Abstraction has 9676 states and 43669 transitions. [2021-07-09 18:00:10,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 9676 states and 43669 transitions. [2021-07-09 18:00:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:10,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:10,637 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, 1, 1, 1] [2021-07-09 18:00:10,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-09 18:00:10,838 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 378336580, now seen corresponding path program 190 times [2021-07-09 18:00:10,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:10,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238456071] [2021-07-09 18:00:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:11,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:11,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238456071] [2021-07-09 18:00:11,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238456071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:11,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830595207] [2021-07-09 18:00:11,009 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 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 [2021-07-09 18:00:11,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:11,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:11,180 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 28 treesize of output 12 [2021-07-09 18:00:11,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:11,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:11,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:11,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:00:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:11,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830595207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:11,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:11,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:00:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898462184] [2021-07-09 18:00:11,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:11,260 INFO L87 Difference]: Start difference. First operand 9676 states and 43669 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:12,344 INFO L93 Difference]: Finished difference Result 10992 states and 48564 transitions. [2021-07-09 18:00:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:00:12,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:12,377 INFO L225 Difference]: With dead ends: 10992 [2021-07-09 18:00:12,377 INFO L226 Difference]: Without dead ends: 10952 [2021-07-09 18:00:12,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 836.4ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:00:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10952 states. [2021-07-09 18:00:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10952 to 9749. [2021-07-09 18:00:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9749 states, 9748 states have (on average 4.516208453016003) internal successors, (44024), 9748 states have internal predecessors, (44024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9749 states to 9749 states and 44024 transitions. [2021-07-09 18:00:12,614 INFO L78 Accepts]: Start accepts. Automaton has 9749 states and 44024 transitions. Word has length 33 [2021-07-09 18:00:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:12,614 INFO L482 AbstractCegarLoop]: Abstraction has 9749 states and 44024 transitions. [2021-07-09 18:00:12,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9749 states and 44024 transitions. [2021-07-09 18:00:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:12,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:12,634 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, 1, 1, 1] [2021-07-09 18:00:12,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-07-09 18:00:12,834 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash 324950060, now seen corresponding path program 191 times [2021-07-09 18:00:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:12,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33034088] [2021-07-09 18:00:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33034088] [2021-07-09 18:00:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33034088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883766793] [2021-07-09 18:00:13,082 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 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 [2021-07-09 18:00:13,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:00:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:13,258 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 28 treesize of output 12 [2021-07-09 18:00:13,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:13,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:13,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:13,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:00:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:13,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883766793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:13,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:13,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:00:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816625194] [2021-07-09 18:00:13,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:13,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:13,330 INFO L87 Difference]: Start difference. First operand 9749 states and 44024 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:16,442 INFO L93 Difference]: Finished difference Result 12361 states and 53176 transitions. [2021-07-09 18:00:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:00:16,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:16,478 INFO L225 Difference]: With dead ends: 12361 [2021-07-09 18:00:16,478 INFO L226 Difference]: Without dead ends: 12232 [2021-07-09 18:00:16,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2605.0ms TimeCoverageRelationStatistics Valid=635, Invalid=3271, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:00:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12232 states. [2021-07-09 18:00:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12232 to 9721. [2021-07-09 18:00:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 9720 states have (on average 4.515637860082305) internal successors, (43892), 9720 states have internal predecessors, (43892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 43892 transitions. [2021-07-09 18:00:16,786 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 43892 transitions. Word has length 33 [2021-07-09 18:00:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:16,786 INFO L482 AbstractCegarLoop]: Abstraction has 9721 states and 43892 transitions. [2021-07-09 18:00:16,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 43892 transitions. [2021-07-09 18:00:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:16,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:16,805 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, 1, 1, 1] [2021-07-09 18:00:17,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-09 18:00:17,006 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -649620276, now seen corresponding path program 192 times [2021-07-09 18:00:17,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:17,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999371548] [2021-07-09 18:00:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:17,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:17,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999371548] [2021-07-09 18:00:17,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999371548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:17,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981832100] [2021-07-09 18:00:17,181 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 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 [2021-07-09 18:00:17,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:00:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:17,471 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:00:17,472 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 33 treesize of output 61 [2021-07-09 18:00:17,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:00:17,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:17,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:17,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-09 18:00:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:17,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981832100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:17,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:17,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:00:17,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925799862] [2021-07-09 18:00:17,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:00:17,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:17,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:00:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:00:17,567 INFO L87 Difference]: Start difference. First operand 9721 states and 43892 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:19,116 INFO L93 Difference]: Finished difference Result 10477 states and 46818 transitions. [2021-07-09 18:00:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:00:19,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:19,149 INFO L225 Difference]: With dead ends: 10477 [2021-07-09 18:00:19,150 INFO L226 Difference]: Without dead ends: 10431 [2021-07-09 18:00:19,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1167.3ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:00:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-07-09 18:00:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9721. [2021-07-09 18:00:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 9720 states have (on average 4.515432098765432) internal successors, (43890), 9720 states have internal predecessors, (43890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 43890 transitions. [2021-07-09 18:00:19,421 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 43890 transitions. Word has length 33 [2021-07-09 18:00:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:19,421 INFO L482 AbstractCegarLoop]: Abstraction has 9721 states and 43890 transitions. [2021-07-09 18:00:19,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 43890 transitions. [2021-07-09 18:00:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:19,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:19,441 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, 1, 1, 1] [2021-07-09 18:00:19,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:19,645 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2062303326, now seen corresponding path program 193 times [2021-07-09 18:00:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123581598] [2021-07-09 18:00:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:19,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:19,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123581598] [2021-07-09 18:00:19,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123581598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:19,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308192214] [2021-07-09 18:00:19,860 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 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 [2021-07-09 18:00:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:20,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 18:00:20,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:20,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:20,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:20,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:00:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308192214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:20,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:20,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:00:20,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853352085] [2021-07-09 18:00:20,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:20,188 INFO L87 Difference]: Start difference. First operand 9721 states and 43890 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:21,834 INFO L93 Difference]: Finished difference Result 10858 states and 48414 transitions. [2021-07-09 18:00:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:00:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:21,868 INFO L225 Difference]: With dead ends: 10858 [2021-07-09 18:00:21,868 INFO L226 Difference]: Without dead ends: 10767 [2021-07-09 18:00:21,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1326.9ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:00:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-07-09 18:00:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 9706. [2021-07-09 18:00:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 9705 states have (on average 4.517053065430191) internal successors, (43838), 9705 states have internal predecessors, (43838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 43838 transitions. [2021-07-09 18:00:22,132 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 43838 transitions. Word has length 33 [2021-07-09 18:00:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:22,132 INFO L482 AbstractCegarLoop]: Abstraction has 9706 states and 43838 transitions. [2021-07-09 18:00:22,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 43838 transitions. [2021-07-09 18:00:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:22,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:22,151 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, 1, 1, 1] [2021-07-09 18:00:22,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:22,352 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1162175214, now seen corresponding path program 194 times [2021-07-09 18:00:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:22,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808818811] [2021-07-09 18:00:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:22,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808818811] [2021-07-09 18:00:22,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808818811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:22,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290415416] [2021-07-09 18:00:22,544 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 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 [2021-07-09 18:00:22,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:22,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:22,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:22,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:22,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:22,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:00:22,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:22,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:22,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:22,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:00:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290415416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:22,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:22,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:00:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617253197] [2021-07-09 18:00:22,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:00:22,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:00:22,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:00:22,958 INFO L87 Difference]: Start difference. First operand 9706 states and 43838 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:23,136 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-07-09 18:00:23,277 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-09 18:00:24,006 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-07-09 18:00:25,154 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-09 18:00:25,325 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-07-09 18:00:25,481 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-09 18:00:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:25,491 INFO L93 Difference]: Finished difference Result 10499 states and 46897 transitions. [2021-07-09 18:00:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:00:25,491 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:25,521 INFO L225 Difference]: With dead ends: 10499 [2021-07-09 18:00:25,521 INFO L226 Difference]: Without dead ends: 10468 [2021-07-09 18:00:25,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 2154.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:00:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2021-07-09 18:00:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 9710. [2021-07-09 18:00:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9710 states, 9709 states have (on average 4.515913070347101) internal successors, (43845), 9709 states have internal predecessors, (43845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9710 states to 9710 states and 43845 transitions. [2021-07-09 18:00:25,716 INFO L78 Accepts]: Start accepts. Automaton has 9710 states and 43845 transitions. Word has length 33 [2021-07-09 18:00:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:25,716 INFO L482 AbstractCegarLoop]: Abstraction has 9710 states and 43845 transitions. [2021-07-09 18:00:25,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9710 states and 43845 transitions. [2021-07-09 18:00:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:25,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:25,735 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, 1, 1, 1] [2021-07-09 18:00:25,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:25,935 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1829519476, now seen corresponding path program 195 times [2021-07-09 18:00:25,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:25,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637083724] [2021-07-09 18:00:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:26,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:26,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637083724] [2021-07-09 18:00:26,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637083724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:26,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494434947] [2021-07-09 18:00:26,103 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 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 [2021-07-09 18:00:26,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:00:26,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:00:26,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:26,295 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:00:26,296 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 29 treesize of output 57 [2021-07-09 18:00:26,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:26,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:26,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:26,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-09 18:00:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:26,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494434947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:26,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:26,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:00:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910452721] [2021-07-09 18:00:26,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:00:26,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:00:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:00:26,480 INFO L87 Difference]: Start difference. First operand 9710 states and 43845 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:27,954 INFO L93 Difference]: Finished difference Result 10473 states and 46775 transitions. [2021-07-09 18:00:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:00:27,954 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:27,983 INFO L225 Difference]: With dead ends: 10473 [2021-07-09 18:00:27,984 INFO L226 Difference]: Without dead ends: 10464 [2021-07-09 18:00:27,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1141.4ms TimeCoverageRelationStatistics Valid=382, Invalid=2168, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:00:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10464 states. [2021-07-09 18:00:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10464 to 9719. [2021-07-09 18:00:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9719 states, 9718 states have (on average 4.514817863757975) internal successors, (43875), 9718 states have internal predecessors, (43875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9719 states to 9719 states and 43875 transitions. [2021-07-09 18:00:28,170 INFO L78 Accepts]: Start accepts. Automaton has 9719 states and 43875 transitions. Word has length 33 [2021-07-09 18:00:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:28,170 INFO L482 AbstractCegarLoop]: Abstraction has 9719 states and 43875 transitions. [2021-07-09 18:00:28,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9719 states and 43875 transitions. [2021-07-09 18:00:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:28,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:28,189 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, 1, 1, 1] [2021-07-09 18:00:28,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:28,389 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:28,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash 797054378, now seen corresponding path program 196 times [2021-07-09 18:00:28,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:28,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584824181] [2021-07-09 18:00:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:28,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584824181] [2021-07-09 18:00:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584824181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271221178] [2021-07-09 18:00:28,560 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 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 [2021-07-09 18:00:28,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:28,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:28,709 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 [2021-07-09 18:00:28,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:28,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:28,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:28,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:00:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:28,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271221178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:28,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:28,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:00:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573194206] [2021-07-09 18:00:28,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:28,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:28,795 INFO L87 Difference]: Start difference. First operand 9719 states and 43875 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:30,141 INFO L93 Difference]: Finished difference Result 10764 states and 47830 transitions. [2021-07-09 18:00:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:00:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:30,172 INFO L225 Difference]: With dead ends: 10764 [2021-07-09 18:00:30,172 INFO L226 Difference]: Without dead ends: 10736 [2021-07-09 18:00:30,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1102.3ms TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:00:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2021-07-09 18:00:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 9767. [2021-07-09 18:00:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 4.518124104034405) internal successors, (44124), 9766 states have internal predecessors, (44124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 44124 transitions. [2021-07-09 18:00:30,363 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 44124 transitions. Word has length 33 [2021-07-09 18:00:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:30,363 INFO L482 AbstractCegarLoop]: Abstraction has 9767 states and 44124 transitions. [2021-07-09 18:00:30,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 44124 transitions. [2021-07-09 18:00:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:30,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:30,382 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, 1, 1, 1] [2021-07-09 18:00:30,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-09 18:00:30,582 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1566085748, now seen corresponding path program 197 times [2021-07-09 18:00:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:30,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721664871] [2021-07-09 18:00:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:30,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:30,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721664871] [2021-07-09 18:00:30,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721664871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:30,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642069406] [2021-07-09 18:00:30,822 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 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 [2021-07-09 18:00:30,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:00:30,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:30,978 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 29 treesize of output 13 [2021-07-09 18:00:30,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:30,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:30,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:30,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:00:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:31,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642069406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:31,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:31,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:00:31,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978503330] [2021-07-09 18:00:31,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:00:31,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:31,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:00:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:00:31,074 INFO L87 Difference]: Start difference. First operand 9767 states and 44124 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:34,562 INFO L93 Difference]: Finished difference Result 11259 states and 49833 transitions. [2021-07-09 18:00:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:00:34,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:34,594 INFO L225 Difference]: With dead ends: 11259 [2021-07-09 18:00:34,594 INFO L226 Difference]: Without dead ends: 11151 [2021-07-09 18:00:34,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2897.8ms TimeCoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:00:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11151 states. [2021-07-09 18:00:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11151 to 9762. [2021-07-09 18:00:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 4.516545435918451) internal successors, (44086), 9761 states have internal predecessors, (44086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 44086 transitions. [2021-07-09 18:00:34,790 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 44086 transitions. Word has length 33 [2021-07-09 18:00:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:34,790 INFO L482 AbstractCegarLoop]: Abstraction has 9762 states and 44086 transitions. [2021-07-09 18:00:34,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 44086 transitions. [2021-07-09 18:00:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:34,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:34,809 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, 1, 1, 1] [2021-07-09 18:00:35,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:35,010 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash 179923100, now seen corresponding path program 198 times [2021-07-09 18:00:35,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:35,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565742909] [2021-07-09 18:00:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:35,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565742909] [2021-07-09 18:00:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565742909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130573340] [2021-07-09 18:00:35,231 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 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 [2021-07-09 18:00:35,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:35,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:35,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:00:35,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:35,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:35,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:35,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:00:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:35,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130573340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:35,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:35,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:00:35,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200964913] [2021-07-09 18:00:35,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:00:35,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:35,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:00:35,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:00:35,601 INFO L87 Difference]: Start difference. First operand 9762 states and 44086 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:38,200 INFO L93 Difference]: Finished difference Result 11048 states and 48438 transitions. [2021-07-09 18:00:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:00:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:38,237 INFO L225 Difference]: With dead ends: 11048 [2021-07-09 18:00:38,237 INFO L226 Difference]: Without dead ends: 11007 [2021-07-09 18:00:38,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2101.4ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:00:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11007 states. [2021-07-09 18:00:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11007 to 9747. [2021-07-09 18:00:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 4.518469115534578) internal successors, (44037), 9746 states have internal predecessors, (44037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 44037 transitions. [2021-07-09 18:00:38,480 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 44037 transitions. Word has length 33 [2021-07-09 18:00:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:38,480 INFO L482 AbstractCegarLoop]: Abstraction has 9747 states and 44037 transitions. [2021-07-09 18:00:38,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 44037 transitions. [2021-07-09 18:00:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:38,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:38,499 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, 1, 1, 1] [2021-07-09 18:00:38,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-09 18:00:38,700 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash -868849302, now seen corresponding path program 199 times [2021-07-09 18:00:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:38,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955399583] [2021-07-09 18:00:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:38,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:38,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955399583] [2021-07-09 18:00:38,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955399583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:38,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162922898] [2021-07-09 18:00:38,873 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 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 [2021-07-09 18:00:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:38,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:39,031 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 29 treesize of output 13 [2021-07-09 18:00:39,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:39,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:39,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:39,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:00:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162922898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:39,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:39,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:00:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748259481] [2021-07-09 18:00:39,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:39,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:39,120 INFO L87 Difference]: Start difference. First operand 9747 states and 44037 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,949 INFO L93 Difference]: Finished difference Result 11122 states and 49316 transitions. [2021-07-09 18:00:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:00:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,986 INFO L225 Difference]: With dead ends: 11122 [2021-07-09 18:00:40,986 INFO L226 Difference]: Without dead ends: 11060 [2021-07-09 18:00:40,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1485.3ms TimeCoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:00:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11060 states. [2021-07-09 18:00:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11060 to 9909. [2021-07-09 18:00:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 4.515643924101736) internal successors, (44741), 9908 states have internal predecessors, (44741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 44741 transitions. [2021-07-09 18:00:41,208 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 44741 transitions. Word has length 33 [2021-07-09 18:00:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:41,208 INFO L482 AbstractCegarLoop]: Abstraction has 9909 states and 44741 transitions. [2021-07-09 18:00:41,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 44741 transitions. [2021-07-09 18:00:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:41,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,227 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, 1, 1, 1] [2021-07-09 18:00:41,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:41,428 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:41,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,428 INFO L82 PathProgramCache]: Analyzing trace with hash 434423304, now seen corresponding path program 200 times [2021-07-09 18:00:41,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569134429] [2021-07-09 18:00:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:41,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:41,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569134429] [2021-07-09 18:00:41,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569134429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:41,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28686294] [2021-07-09 18:00:41,606 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 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 [2021-07-09 18:00:41,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:41,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:41,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:00:41,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:41,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:41,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:41,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:00:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28686294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:42,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:42,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:00:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598398083] [2021-07-09 18:00:42,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:00:42,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:00:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:00:42,039 INFO L87 Difference]: Start difference. First operand 9909 states and 44741 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:43,442 INFO L93 Difference]: Finished difference Result 10535 states and 47047 transitions. [2021-07-09 18:00:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:00:43,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:43,474 INFO L225 Difference]: With dead ends: 10535 [2021-07-09 18:00:43,474 INFO L226 Difference]: Without dead ends: 10518 [2021-07-09 18:00:43,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1313.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1684, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:00:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-07-09 18:00:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 9909. [2021-07-09 18:00:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 9908 states have (on average 4.514937424303593) internal successors, (44734), 9908 states have internal predecessors, (44734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 44734 transitions. [2021-07-09 18:00:43,681 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 44734 transitions. Word has length 33 [2021-07-09 18:00:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:43,681 INFO L482 AbstractCegarLoop]: Abstraction has 9909 states and 44734 transitions. [2021-07-09 18:00:43,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 44734 transitions. [2021-07-09 18:00:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:43,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:43,702 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, 1, 1, 1] [2021-07-09 18:00:43,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:43,903 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash -464938768, now seen corresponding path program 201 times [2021-07-09 18:00:43,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:43,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882250943] [2021-07-09 18:00:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:44,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882250943] [2021-07-09 18:00:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882250943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953486613] [2021-07-09 18:00:44,204 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 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 [2021-07-09 18:00:44,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:00:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:00:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:44,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:44,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:44,373 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 25 treesize of output 31 [2021-07-09 18:00:44,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:44,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:44,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:38 [2021-07-09 18:00:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:44,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953486613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:44,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:44,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:00:44,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406785200] [2021-07-09 18:00:44,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:00:44,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:44,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:00:44,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:00:44,579 INFO L87 Difference]: Start difference. First operand 9909 states and 44734 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:45,674 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-09 18:00:45,932 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-09 18:00:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:47,701 INFO L93 Difference]: Finished difference Result 10925 states and 48576 transitions. [2021-07-09 18:00:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:00:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:47,736 INFO L225 Difference]: With dead ends: 10925 [2021-07-09 18:00:47,736 INFO L226 Difference]: Without dead ends: 10879 [2021-07-09 18:00:47,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2618.4ms TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:00:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10879 states. [2021-07-09 18:00:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10879 to 9900. [2021-07-09 18:00:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9899 states have (on average 4.516011718355389) internal successors, (44704), 9899 states have internal predecessors, (44704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 44704 transitions. [2021-07-09 18:00:47,961 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 44704 transitions. Word has length 33 [2021-07-09 18:00:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:47,961 INFO L482 AbstractCegarLoop]: Abstraction has 9900 states and 44704 transitions. [2021-07-09 18:00:47,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 44704 transitions. [2021-07-09 18:00:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:47,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:47,980 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, 1, 1, 1] [2021-07-09 18:00:48,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-07-09 18:00:48,181 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2049430226, now seen corresponding path program 202 times [2021-07-09 18:00:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293112661] [2021-07-09 18:00:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:48,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:48,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293112661] [2021-07-09 18:00:48,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293112661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:48,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433794422] [2021-07-09 18:00:48,422 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 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 [2021-07-09 18:00:48,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:48,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:48,576 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 [2021-07-09 18:00:48,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:48,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:48,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:48,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:00:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:48,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433794422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:48,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:48,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:00:48,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635766785] [2021-07-09 18:00:48,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:00:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:00:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:00:48,672 INFO L87 Difference]: Start difference. First operand 9900 states and 44704 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:50,996 INFO L93 Difference]: Finished difference Result 10927 states and 48544 transitions. [2021-07-09 18:00:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:00:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:51,029 INFO L225 Difference]: With dead ends: 10927 [2021-07-09 18:00:51,030 INFO L226 Difference]: Without dead ends: 10861 [2021-07-09 18:00:51,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1989.7ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:00:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-07-09 18:00:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 9863. [2021-07-09 18:00:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9863 states, 9862 states have (on average 4.517136483471912) internal successors, (44548), 9862 states have internal predecessors, (44548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 44548 transitions. [2021-07-09 18:00:51,241 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 44548 transitions. Word has length 33 [2021-07-09 18:00:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:51,241 INFO L482 AbstractCegarLoop]: Abstraction has 9863 states and 44548 transitions. [2021-07-09 18:00:51,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 44548 transitions. [2021-07-09 18:00:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:51,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:51,261 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, 1, 1, 1] [2021-07-09 18:00:51,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:51,462 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash -349616982, now seen corresponding path program 203 times [2021-07-09 18:00:51,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:51,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968811381] [2021-07-09 18:00:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:51,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968811381] [2021-07-09 18:00:51,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968811381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354153953] [2021-07-09 18:00:51,634 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 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 [2021-07-09 18:00:51,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:00:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:51,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:51,849 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 [2021-07-09 18:00:51,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:51,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:51,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:51,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:00:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:51,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354153953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:51,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:51,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:00:51,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490946209] [2021-07-09 18:00:51,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:00:51,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:00:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:00:51,939 INFO L87 Difference]: Start difference. First operand 9863 states and 44548 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:53,466 INFO L93 Difference]: Finished difference Result 10515 states and 47212 transitions. [2021-07-09 18:00:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:00:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:53,498 INFO L225 Difference]: With dead ends: 10515 [2021-07-09 18:00:53,498 INFO L226 Difference]: Without dead ends: 10463 [2021-07-09 18:00:53,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1299.3ms TimeCoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:00:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-07-09 18:00:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9848. [2021-07-09 18:00:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9848 states, 9847 states have (on average 4.519041332385498) internal successors, (44499), 9847 states have internal predecessors, (44499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9848 states to 9848 states and 44499 transitions. [2021-07-09 18:00:53,700 INFO L78 Accepts]: Start accepts. Automaton has 9848 states and 44499 transitions. Word has length 33 [2021-07-09 18:00:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:53,700 INFO L482 AbstractCegarLoop]: Abstraction has 9848 states and 44499 transitions. [2021-07-09 18:00:53,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9848 states and 44499 transitions. [2021-07-09 18:00:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:53,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:53,722 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, 1, 1, 1] [2021-07-09 18:00:53,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-09 18:00:53,922 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1565931522, now seen corresponding path program 204 times [2021-07-09 18:00:53,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:53,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937620469] [2021-07-09 18:00:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:54,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:54,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937620469] [2021-07-09 18:00:54,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937620469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:54,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547505365] [2021-07-09 18:00:54,153 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 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 [2021-07-09 18:00:54,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:00:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:54,394 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:00:54,394 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 27 treesize of output 55 [2021-07-09 18:00:54,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:00:54,425 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-07-09 18:00:54,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:54,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 18:00:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547505365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:54,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:54,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:00:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274663146] [2021-07-09 18:00:54,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:00:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:00:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:00:54,564 INFO L87 Difference]: Start difference. First operand 9848 states and 44499 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:56,207 INFO L93 Difference]: Finished difference Result 10903 states and 48475 transitions. [2021-07-09 18:00:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:00:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:56,238 INFO L225 Difference]: With dead ends: 10903 [2021-07-09 18:00:56,239 INFO L226 Difference]: Without dead ends: 10872 [2021-07-09 18:00:56,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1361.9ms TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:00:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10872 states. [2021-07-09 18:00:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10872 to 9939. [2021-07-09 18:00:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9939 states, 9938 states have (on average 4.519118534916482) internal successors, (44911), 9938 states have internal predecessors, (44911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9939 states to 9939 states and 44911 transitions. [2021-07-09 18:00:56,484 INFO L78 Accepts]: Start accepts. Automaton has 9939 states and 44911 transitions. Word has length 33 [2021-07-09 18:00:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:56,484 INFO L482 AbstractCegarLoop]: Abstraction has 9939 states and 44911 transitions. [2021-07-09 18:00:56,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 9939 states and 44911 transitions. [2021-07-09 18:00:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:56,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:56,504 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, 1, 1, 1] [2021-07-09 18:00:56,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 18:00:56,705 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1425763168, now seen corresponding path program 205 times [2021-07-09 18:00:56,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:56,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080532730] [2021-07-09 18:00:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:56,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:56,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080532730] [2021-07-09 18:00:56,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080532730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:56,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714721183] [2021-07-09 18:00:56,870 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 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 [2021-07-09 18:00:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:56,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:56,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:57,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:00:57,058 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 28 treesize of output 12 [2021-07-09 18:00:57,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:57,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:57,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:57,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:00:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714721183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:57,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:57,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:00:57,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946092332] [2021-07-09 18:00:57,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:00:57,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:00:57,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:00:57,138 INFO L87 Difference]: Start difference. First operand 9939 states and 44911 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:58,453 INFO L93 Difference]: Finished difference Result 11337 states and 50150 transitions. [2021-07-09 18:00:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:00:58,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:00:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:58,486 INFO L225 Difference]: With dead ends: 11337 [2021-07-09 18:00:58,486 INFO L226 Difference]: Without dead ends: 11305 [2021-07-09 18:00:58,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1030.3ms TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:00:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11305 states. [2021-07-09 18:00:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11305 to 10013. [2021-07-09 18:00:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10012 states have (on average 4.521973631642029) internal successors, (45274), 10012 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 45274 transitions. [2021-07-09 18:00:58,760 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 45274 transitions. Word has length 33 [2021-07-09 18:00:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:58,761 INFO L482 AbstractCegarLoop]: Abstraction has 10013 states and 45274 transitions. [2021-07-09 18:00:58,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:00:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 45274 transitions. [2021-07-09 18:00:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:00:58,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:58,780 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, 1, 1, 1] [2021-07-09 18:00:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:58,981 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1200810686, now seen corresponding path program 206 times [2021-07-09 18:00:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981954621] [2021-07-09 18:00:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:59,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981954621] [2021-07-09 18:00:59,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981954621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576724962] [2021-07-09 18:00:59,146 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 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 [2021-07-09 18:00:59,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:00:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:59,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:59,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:00:59,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:00:59,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:00:59,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:00:59,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:00:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:59,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576724962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:59,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:59,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:00:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884303337] [2021-07-09 18:00:59,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:00:59,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:00:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:00:59,503 INFO L87 Difference]: Start difference. First operand 10013 states and 45274 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:00,796 INFO L93 Difference]: Finished difference Result 10866 states and 48475 transitions. [2021-07-09 18:01:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:01:00,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:00,831 INFO L225 Difference]: With dead ends: 10866 [2021-07-09 18:01:00,831 INFO L226 Difference]: Without dead ends: 10848 [2021-07-09 18:01:00,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1133.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:01:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10848 states. [2021-07-09 18:01:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 10009. [2021-07-09 18:01:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 4.5223820943245405) internal successors, (45260), 10008 states have internal predecessors, (45260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 45260 transitions. [2021-07-09 18:01:01,097 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 45260 transitions. Word has length 33 [2021-07-09 18:01:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:01,098 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 45260 transitions. [2021-07-09 18:01:01,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 45260 transitions. [2021-07-09 18:01:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:01,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:01,121 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, 1, 1, 1] [2021-07-09 18:01:01,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:01,322 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1479149688, now seen corresponding path program 207 times [2021-07-09 18:01:01,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:01,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80268145] [2021-07-09 18:01:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:01,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80268145] [2021-07-09 18:01:01,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80268145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598537901] [2021-07-09 18:01:01,562 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 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 [2021-07-09 18:01:01,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:01:01,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:01,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:01,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-09 18:01:01,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:01,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:01,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:01,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-09 18:01:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:01,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598537901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:01,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:01,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:01:01,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568097577] [2021-07-09 18:01:01,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:01:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:01:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:01:01,929 INFO L87 Difference]: Start difference. First operand 10009 states and 45260 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:02,076 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-07-09 18:01:02,318 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-07-09 18:01:03,033 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-07-09 18:01:04,951 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-09 18:01:05,299 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 18:01:05,472 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-09 18:01:05,657 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 18:01:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:05,877 INFO L93 Difference]: Finished difference Result 12044 states and 52051 transitions. [2021-07-09 18:01:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:01:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:05,914 INFO L225 Difference]: With dead ends: 12044 [2021-07-09 18:01:05,914 INFO L226 Difference]: Without dead ends: 11983 [2021-07-09 18:01:05,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3318.4ms TimeCoverageRelationStatistics Valid=668, Invalid=3888, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:01:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11983 states. [2021-07-09 18:01:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11983 to 9932. [2021-07-09 18:01:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9932 states, 9931 states have (on average 4.521699728124056) internal successors, (44905), 9931 states have internal predecessors, (44905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 44905 transitions. [2021-07-09 18:01:06,198 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 44905 transitions. Word has length 33 [2021-07-09 18:01:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:06,199 INFO L482 AbstractCegarLoop]: Abstraction has 9932 states and 44905 transitions. [2021-07-09 18:01:06,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 44905 transitions. [2021-07-09 18:01:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:06,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:06,220 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, 1, 1, 1] [2021-07-09 18:01:06,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:06,421 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2085163842, now seen corresponding path program 208 times [2021-07-09 18:01:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:06,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47729352] [2021-07-09 18:01:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:06,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47729352] [2021-07-09 18:01:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47729352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737234194] [2021-07-09 18:01:06,590 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 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 [2021-07-09 18:01:06,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:06,787 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 [2021-07-09 18:01:06,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:06,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:06,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:01:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:06,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737234194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:06,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:06,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:06,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784511913] [2021-07-09 18:01:06,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:06,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:06,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:06,875 INFO L87 Difference]: Start difference. First operand 9932 states and 44905 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:08,606 INFO L93 Difference]: Finished difference Result 10683 states and 47883 transitions. [2021-07-09 18:01:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:01:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:08,641 INFO L225 Difference]: With dead ends: 10683 [2021-07-09 18:01:08,641 INFO L226 Difference]: Without dead ends: 10643 [2021-07-09 18:01:08,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1427.1ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:01:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2021-07-09 18:01:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 9935. [2021-07-09 18:01:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.520938192067646) internal successors, (44911), 9934 states have internal predecessors, (44911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 44911 transitions. [2021-07-09 18:01:08,908 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 44911 transitions. Word has length 33 [2021-07-09 18:01:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:08,908 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 44911 transitions. [2021-07-09 18:01:08,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 44911 transitions. [2021-07-09 18:01:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:08,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:08,929 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, 1, 1, 1] [2021-07-09 18:01:09,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-09 18:01:09,129 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1521566418, now seen corresponding path program 209 times [2021-07-09 18:01:09,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:09,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517789353] [2021-07-09 18:01:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:09,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:09,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517789353] [2021-07-09 18:01:09,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517789353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:09,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390804194] [2021-07-09 18:01:09,307 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 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 [2021-07-09 18:01:09,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:09,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:09,491 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 28 treesize of output 12 [2021-07-09 18:01:09,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:09,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:09,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:09,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:01:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:09,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390804194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:09,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:09,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:09,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882761801] [2021-07-09 18:01:09,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:09,567 INFO L87 Difference]: Start difference. First operand 9935 states and 44911 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:11,278 INFO L93 Difference]: Finished difference Result 11298 states and 50151 transitions. [2021-07-09 18:01:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:01:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:11,311 INFO L225 Difference]: With dead ends: 11298 [2021-07-09 18:01:11,311 INFO L226 Difference]: Without dead ends: 11216 [2021-07-09 18:01:11,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1398.8ms TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:01:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11216 states. [2021-07-09 18:01:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11216 to 9944. [2021-07-09 18:01:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 4.521371819370412) internal successors, (44956), 9943 states have internal predecessors, (44956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 44956 transitions. [2021-07-09 18:01:11,525 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 44956 transitions. Word has length 33 [2021-07-09 18:01:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:11,525 INFO L482 AbstractCegarLoop]: Abstraction has 9944 states and 44956 transitions. [2021-07-09 18:01:11,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 44956 transitions. [2021-07-09 18:01:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:11,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:11,544 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, 1, 1, 1] [2021-07-09 18:01:11,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-09 18:01:11,745 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:11,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:11,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1841247272, now seen corresponding path program 210 times [2021-07-09 18:01:11,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:11,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326442964] [2021-07-09 18:01:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:11,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326442964] [2021-07-09 18:01:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326442964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077548773] [2021-07-09 18:01:11,915 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 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 [2021-07-09 18:01:11,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:11,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:11,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:12,218 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:01:12,218 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 33 treesize of output 61 [2021-07-09 18:01:12,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:12,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:12,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:12,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-09 18:01:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:12,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077548773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:12,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:12,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197072365] [2021-07-09 18:01:12,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:12,315 INFO L87 Difference]: Start difference. First operand 9944 states and 44956 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:13,911 INFO L93 Difference]: Finished difference Result 10525 states and 47152 transitions. [2021-07-09 18:01:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:01:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:13,942 INFO L225 Difference]: With dead ends: 10525 [2021-07-09 18:01:13,942 INFO L226 Difference]: Without dead ends: 10471 [2021-07-09 18:01:13,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1106.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:01:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2021-07-09 18:01:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 9929. [2021-07-09 18:01:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9928 states have (on average 4.522562449637389) internal successors, (44900), 9928 states have internal predecessors, (44900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 44900 transitions. [2021-07-09 18:01:14,139 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 44900 transitions. Word has length 33 [2021-07-09 18:01:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:14,139 INFO L482 AbstractCegarLoop]: Abstraction has 9929 states and 44900 transitions. [2021-07-09 18:01:14,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 44900 transitions. [2021-07-09 18:01:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:14,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:14,159 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, 1, 1, 1] [2021-07-09 18:01:14,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 18:01:14,360 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash -417874744, now seen corresponding path program 211 times [2021-07-09 18:01:14,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:14,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194403693] [2021-07-09 18:01:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:14,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:14,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194403693] [2021-07-09 18:01:14,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194403693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:14,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463697398] [2021-07-09 18:01:14,529 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 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 [2021-07-09 18:01:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:14,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:14,716 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 28 treesize of output 12 [2021-07-09 18:01:14,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:14,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:14,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:14,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:01:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:14,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463697398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:14,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:14,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:14,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926283144] [2021-07-09 18:01:14,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:14,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:14,796 INFO L87 Difference]: Start difference. First operand 9929 states and 44900 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:16,731 INFO L93 Difference]: Finished difference Result 11120 states and 49642 transitions. [2021-07-09 18:01:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:01:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:16,764 INFO L225 Difference]: With dead ends: 11120 [2021-07-09 18:01:16,764 INFO L226 Difference]: Without dead ends: 11089 [2021-07-09 18:01:16,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1565.7ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:01:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2021-07-09 18:01:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 10047. [2021-07-09 18:01:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 4.522496516026279) internal successors, (45433), 10046 states have internal predecessors, (45433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 45433 transitions. [2021-07-09 18:01:16,989 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 45433 transitions. Word has length 33 [2021-07-09 18:01:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:16,989 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 45433 transitions. [2021-07-09 18:01:16,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 45433 transitions. [2021-07-09 18:01:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:17,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:17,009 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, 1, 1, 1] [2021-07-09 18:01:17,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-09 18:01:17,210 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:17,210 INFO L82 PathProgramCache]: Analyzing trace with hash 885397862, now seen corresponding path program 212 times [2021-07-09 18:01:17,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:17,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509377364] [2021-07-09 18:01:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:17,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509377364] [2021-07-09 18:01:17,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509377364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:17,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148315458] [2021-07-09 18:01:17,380 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 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 [2021-07-09 18:01:17,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:17,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:17,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:17,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:01:17,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:17,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:17,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:17,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:01:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:17,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148315458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:17,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:17,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:17,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332903091] [2021-07-09 18:01:17,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:17,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:17,741 INFO L87 Difference]: Start difference. First operand 10047 states and 45433 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:18,931 INFO L93 Difference]: Finished difference Result 10679 states and 47706 transitions. [2021-07-09 18:01:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:01:18,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:18,963 INFO L225 Difference]: With dead ends: 10679 [2021-07-09 18:01:18,963 INFO L226 Difference]: Without dead ends: 10662 [2021-07-09 18:01:18,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1013.1ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:01:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-07-09 18:01:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 10047. [2021-07-09 18:01:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 4.521799721282102) internal successors, (45426), 10046 states have internal predecessors, (45426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 45426 transitions. [2021-07-09 18:01:19,169 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 45426 transitions. Word has length 33 [2021-07-09 18:01:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:19,169 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 45426 transitions. [2021-07-09 18:01:19,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 45426 transitions. [2021-07-09 18:01:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:19,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:19,190 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, 1, 1, 1] [2021-07-09 18:01:19,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:19,391 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash -13964210, now seen corresponding path program 213 times [2021-07-09 18:01:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:19,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920200171] [2021-07-09 18:01:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:19,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920200171] [2021-07-09 18:01:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920200171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941520638] [2021-07-09 18:01:19,627 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 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 [2021-07-09 18:01:19,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:01:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:19,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:19,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:01:19,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:19,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:19,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:19,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:01:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:20,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941520638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:20,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:20,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035426259] [2021-07-09 18:01:20,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:20,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:20,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:20,082 INFO L87 Difference]: Start difference. First operand 10047 states and 45426 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:20,229 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-09 18:01:20,467 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-07-09 18:01:21,211 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-07-09 18:01:23,095 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-09 18:01:23,337 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-09 18:01:23,534 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-09 18:01:23,722 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-07-09 18:01:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:23,735 INFO L93 Difference]: Finished difference Result 11114 states and 49418 transitions. [2021-07-09 18:01:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:01:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:23,769 INFO L225 Difference]: With dead ends: 11114 [2021-07-09 18:01:23,769 INFO L226 Difference]: Without dead ends: 11091 [2021-07-09 18:01:23,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3120.5ms TimeCoverageRelationStatistics Valid=494, Invalid=3288, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:01:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11091 states. [2021-07-09 18:01:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11091 to 10047. [2021-07-09 18:01:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 4.521799721282102) internal successors, (45426), 10046 states have internal predecessors, (45426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 45426 transitions. [2021-07-09 18:01:23,980 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 45426 transitions. Word has length 33 [2021-07-09 18:01:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:23,980 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 45426 transitions. [2021-07-09 18:01:23,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 45426 transitions. [2021-07-09 18:01:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:24,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:24,000 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, 1, 1, 1] [2021-07-09 18:01:24,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:24,200 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1794562512, now seen corresponding path program 214 times [2021-07-09 18:01:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:24,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986229242] [2021-07-09 18:01:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:24,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986229242] [2021-07-09 18:01:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986229242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53592537] [2021-07-09 18:01:24,437 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 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 [2021-07-09 18:01:24,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:24,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:24,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:24,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:24,618 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 [2021-07-09 18:01:24,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:24,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:24,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:24,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:01:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53592537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:24,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:01:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603136596] [2021-07-09 18:01:24,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:01:24,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:01:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:01:24,697 INFO L87 Difference]: Start difference. First operand 10047 states and 45426 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:25,817 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 18:01:26,017 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 18:01:26,300 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-09 18:01:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:27,669 INFO L93 Difference]: Finished difference Result 11226 states and 49984 transitions. [2021-07-09 18:01:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:01:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:27,702 INFO L225 Difference]: With dead ends: 11226 [2021-07-09 18:01:27,702 INFO L226 Difference]: Without dead ends: 11169 [2021-07-09 18:01:27,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2387.9ms TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:01:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11169 states. [2021-07-09 18:01:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11169 to 10001. [2021-07-09 18:01:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 10000 states have (on average 4.5222) internal successors, (45222), 10000 states have internal predecessors, (45222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 45222 transitions. [2021-07-09 18:01:28,010 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 45222 transitions. Word has length 33 [2021-07-09 18:01:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:28,011 INFO L482 AbstractCegarLoop]: Abstraction has 10001 states and 45222 transitions. [2021-07-09 18:01:28,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 45222 transitions. [2021-07-09 18:01:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:28,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:28,032 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, 1, 1, 1] [2021-07-09 18:01:28,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:28,232 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:28,233 INFO L82 PathProgramCache]: Analyzing trace with hash 101357576, now seen corresponding path program 215 times [2021-07-09 18:01:28,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:28,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267755546] [2021-07-09 18:01:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:28,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:28,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267755546] [2021-07-09 18:01:28,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267755546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:28,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529639639] [2021-07-09 18:01:28,409 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 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 [2021-07-09 18:01:28,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:28,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:28,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:28,605 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 [2021-07-09 18:01:28,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:28,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:28,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:28,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:01:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:28,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529639639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:28,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:28,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:28,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809488269] [2021-07-09 18:01:28,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:28,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:28,687 INFO L87 Difference]: Start difference. First operand 10001 states and 45222 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:30,566 INFO L93 Difference]: Finished difference Result 10673 states and 47914 transitions. [2021-07-09 18:01:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:01:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:30,692 INFO L225 Difference]: With dead ends: 10673 [2021-07-09 18:01:30,692 INFO L226 Difference]: Without dead ends: 10621 [2021-07-09 18:01:30,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1542.3ms TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:01:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2021-07-09 18:01:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 9977. [2021-07-09 18:01:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9977 states, 9976 states have (on average 4.522453889334402) internal successors, (45116), 9976 states have internal predecessors, (45116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 45116 transitions. [2021-07-09 18:01:30,925 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 45116 transitions. Word has length 33 [2021-07-09 18:01:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:30,925 INFO L482 AbstractCegarLoop]: Abstraction has 9977 states and 45116 transitions. [2021-07-09 18:01:30,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 45116 transitions. [2021-07-09 18:01:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:30,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:30,946 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, 1, 1, 1] [2021-07-09 18:01:31,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 18:01:31,146 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -142558994, now seen corresponding path program 216 times [2021-07-09 18:01:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:31,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502692026] [2021-07-09 18:01:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:31,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:31,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502692026] [2021-07-09 18:01:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502692026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:31,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506154025] [2021-07-09 18:01:31,323 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 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 [2021-07-09 18:01:31,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:31,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:31,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:31,632 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:01:31,632 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 33 treesize of output 61 [2021-07-09 18:01:31,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:31,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:31,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:31,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-07-09 18:01:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:31,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506154025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:31,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:31,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:31,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365773066] [2021-07-09 18:01:31,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:31,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:31,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:31,737 INFO L87 Difference]: Start difference. First operand 9977 states and 45116 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:33,349 INFO L93 Difference]: Finished difference Result 10560 states and 47255 transitions. [2021-07-09 18:01:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:01:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:33,383 INFO L225 Difference]: With dead ends: 10560 [2021-07-09 18:01:33,383 INFO L226 Difference]: Without dead ends: 10506 [2021-07-09 18:01:33,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1135.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:01:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10506 states. [2021-07-09 18:01:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10506 to 9956. [2021-07-09 18:01:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 4.521546961325967) internal successors, (45012), 9955 states have internal predecessors, (45012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 45012 transitions. [2021-07-09 18:01:33,613 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 45012 transitions. Word has length 33 [2021-07-09 18:01:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:33,613 INFO L482 AbstractCegarLoop]: Abstraction has 9956 states and 45012 transitions. [2021-07-09 18:01:33,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 45012 transitions. [2021-07-09 18:01:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:33,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:33,635 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, 1, 1, 1] [2021-07-09 18:01:33,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 18:01:33,835 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2012117000, now seen corresponding path program 217 times [2021-07-09 18:01:33,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:33,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663805640] [2021-07-09 18:01:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:34,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:34,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663805640] [2021-07-09 18:01:34,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663805640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:34,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167082846] [2021-07-09 18:01:34,015 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 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 [2021-07-09 18:01:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:34,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:34,245 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 [2021-07-09 18:01:34,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:34,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:34,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:34,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 18:01:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:34,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167082846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:34,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:34,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:34,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531323424] [2021-07-09 18:01:34,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:34,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:34,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:34,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:34,303 INFO L87 Difference]: Start difference. First operand 9956 states and 45012 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:35,904 INFO L93 Difference]: Finished difference Result 10386 states and 46734 transitions. [2021-07-09 18:01:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:01:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:35,938 INFO L225 Difference]: With dead ends: 10386 [2021-07-09 18:01:35,938 INFO L226 Difference]: Without dead ends: 10334 [2021-07-09 18:01:35,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1244.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:01:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-07-09 18:01:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 9956. [2021-07-09 18:01:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 4.521346057257659) internal successors, (45010), 9955 states have internal predecessors, (45010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 45010 transitions. [2021-07-09 18:01:36,177 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 45010 transitions. Word has length 33 [2021-07-09 18:01:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:36,177 INFO L482 AbstractCegarLoop]: Abstraction has 9956 states and 45010 transitions. [2021-07-09 18:01:36,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 45010 transitions. [2021-07-09 18:01:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:36,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:36,198 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, 1, 1, 1] [2021-07-09 18:01:36,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-09 18:01:36,399 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1560871832, now seen corresponding path program 218 times [2021-07-09 18:01:36,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:36,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549959730] [2021-07-09 18:01:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:36,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:36,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549959730] [2021-07-09 18:01:36,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549959730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:36,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747090556] [2021-07-09 18:01:36,574 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 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 [2021-07-09 18:01:36,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:36,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:36,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:36,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:01:36,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:36,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:36,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:36,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-07-09 18:01:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:36,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747090556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:36,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:36,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:01:36,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771834303] [2021-07-09 18:01:36,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:01:36,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:36,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:01:36,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:01:36,944 INFO L87 Difference]: Start difference. First operand 9956 states and 45010 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:38,196 INFO L93 Difference]: Finished difference Result 10549 states and 47330 transitions. [2021-07-09 18:01:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:01:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:38,227 INFO L225 Difference]: With dead ends: 10549 [2021-07-09 18:01:38,228 INFO L226 Difference]: Without dead ends: 10493 [2021-07-09 18:01:38,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:01:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10493 states. [2021-07-09 18:01:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10493 to 9929. [2021-07-09 18:01:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9928 states have (on average 4.522562449637389) internal successors, (44900), 9928 states have internal predecessors, (44900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 44900 transitions. [2021-07-09 18:01:38,431 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 44900 transitions. Word has length 33 [2021-07-09 18:01:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,431 INFO L482 AbstractCegarLoop]: Abstraction has 9929 states and 44900 transitions. [2021-07-09 18:01:38,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 44900 transitions. [2021-07-09 18:01:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:38,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:38,451 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, 1, 1, 1] [2021-07-09 18:01:38,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:38,668 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1229275904, now seen corresponding path program 1 times [2021-07-09 18:01:38,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:38,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254876429] [2021-07-09 18:01:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:38,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:38,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254876429] [2021-07-09 18:01:38,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254876429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:38,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718440801] [2021-07-09 18:01:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:01:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:39,112 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 [2021-07-09 18:01:39,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:39,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:39,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:39,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-07-09 18:01:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:39,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718440801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:39,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:39,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492084104] [2021-07-09 18:01:39,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:39,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:39,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:39,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:39,166 INFO L87 Difference]: Start difference. First operand 9929 states and 44900 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:40,567 INFO L93 Difference]: Finished difference Result 11004 states and 49283 transitions. [2021-07-09 18:01:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:01:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:40,601 INFO L225 Difference]: With dead ends: 11004 [2021-07-09 18:01:40,601 INFO L226 Difference]: Without dead ends: 10955 [2021-07-09 18:01:40,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:01:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-07-09 18:01:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 10002. [2021-07-09 18:01:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10002 states, 10001 states have (on average 4.5233476652334765) internal successors, (45238), 10001 states have internal predecessors, (45238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10002 states to 10002 states and 45238 transitions. [2021-07-09 18:01:40,897 INFO L78 Accepts]: Start accepts. Automaton has 10002 states and 45238 transitions. Word has length 33 [2021-07-09 18:01:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:40,897 INFO L482 AbstractCegarLoop]: Abstraction has 10002 states and 45238 transitions. [2021-07-09 18:01:40,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10002 states and 45238 transitions. [2021-07-09 18:01:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:40,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:40,922 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, 1, 1, 1] [2021-07-09 18:01:41,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,123 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:41,123 INFO L82 PathProgramCache]: Analyzing trace with hash 994565066, now seen corresponding path program 2 times [2021-07-09 18:01:41,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:41,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122149640] [2021-07-09 18:01:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:41,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122149640] [2021-07-09 18:01:41,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122149640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354739113] [2021-07-09 18:01:41,292 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 [2021-07-09 18:01:41,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:41,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:41,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:01:41,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:41,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:41,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:41,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:01:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354739113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:41,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:01:41,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316911723] [2021-07-09 18:01:41,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:01:41,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:01:41,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:01:41,631 INFO L87 Difference]: Start difference. First operand 10002 states and 45238 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:42,993 INFO L93 Difference]: Finished difference Result 11153 states and 49890 transitions. [2021-07-09 18:01:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:01:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:43,030 INFO L225 Difference]: With dead ends: 11153 [2021-07-09 18:01:43,030 INFO L226 Difference]: Without dead ends: 11113 [2021-07-09 18:01:43,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 930.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:01:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2021-07-09 18:01:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10002. [2021-07-09 18:01:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10002 states, 10001 states have (on average 4.5233476652334765) internal successors, (45238), 10001 states have internal predecessors, (45238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10002 states to 10002 states and 45238 transitions. [2021-07-09 18:01:43,263 INFO L78 Accepts]: Start accepts. Automaton has 10002 states and 45238 transitions. Word has length 33 [2021-07-09 18:01:43,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:43,263 INFO L482 AbstractCegarLoop]: Abstraction has 10002 states and 45238 transitions. [2021-07-09 18:01:43,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,263 INFO L276 IsEmpty]: Start isEmpty. Operand 10002 states and 45238 transitions. [2021-07-09 18:01:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:43,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:43,284 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, 1, 1, 1] [2021-07-09 18:01:43,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,485 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 430967642, now seen corresponding path program 3 times [2021-07-09 18:01:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:43,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123563763] [2021-07-09 18:01:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123563763] [2021-07-09 18:01:43,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123563763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557163431] [2021-07-09 18:01:43,683 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 [2021-07-09 18:01:43,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:43,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:43,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-07-09 18:01:43,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:43,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:43,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:43,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-07-09 18:01:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:44,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557163431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:44,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:44,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:01:44,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687643436] [2021-07-09 18:01:44,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:01:44,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:01:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:01:44,038 INFO L87 Difference]: Start difference. First operand 10002 states and 45238 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:45,524 INFO L93 Difference]: Finished difference Result 11171 states and 49912 transitions. [2021-07-09 18:01:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:01:45,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:45,560 INFO L225 Difference]: With dead ends: 11171 [2021-07-09 18:01:45,560 INFO L226 Difference]: Without dead ends: 11140 [2021-07-09 18:01:45,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1079.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:01:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2021-07-09 18:01:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 10005. [2021-07-09 18:01:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 4.5225909636145545) internal successors, (45244), 10004 states have internal predecessors, (45244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 45244 transitions. [2021-07-09 18:01:45,800 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 45244 transitions. Word has length 33 [2021-07-09 18:01:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:45,801 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 45244 transitions. [2021-07-09 18:01:45,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 45244 transitions. [2021-07-09 18:01:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:45,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:45,822 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, 1, 1, 1] [2021-07-09 18:01:46,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 18:01:46,023 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash 59742636, now seen corresponding path program 4 times [2021-07-09 18:01:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:46,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907623256] [2021-07-09 18:01:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:46,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:46,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907623256] [2021-07-09 18:01:46,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907623256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314802751] [2021-07-09 18:01:46,260 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 [2021-07-09 18:01:46,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-09 18:01:46,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:46,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:46,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:46,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:01:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:46,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314802751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:46,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:01:46,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148869027] [2021-07-09 18:01:46,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:01:46,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:01:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:01:46,530 INFO L87 Difference]: Start difference. First operand 10005 states and 45244 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:47,717 INFO L93 Difference]: Finished difference Result 11207 states and 50044 transitions. [2021-07-09 18:01:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:01:47,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:47,754 INFO L225 Difference]: With dead ends: 11207 [2021-07-09 18:01:47,755 INFO L226 Difference]: Without dead ends: 11184 [2021-07-09 18:01:47,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 869.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:01:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11184 states. [2021-07-09 18:01:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11184 to 10079. [2021-07-09 18:01:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10079 states, 10078 states have (on average 4.520341337566977) internal successors, (45556), 10078 states have internal predecessors, (45556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10079 states to 10079 states and 45556 transitions. [2021-07-09 18:01:47,991 INFO L78 Accepts]: Start accepts. Automaton has 10079 states and 45556 transitions. Word has length 33 [2021-07-09 18:01:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:47,992 INFO L482 AbstractCegarLoop]: Abstraction has 10079 states and 45556 transitions. [2021-07-09 18:01:47,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10079 states and 45556 transitions. [2021-07-09 18:01:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:48,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:48,012 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, 1, 1, 1] [2021-07-09 18:01:48,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-09 18:01:48,212 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1608650806, now seen corresponding path program 5 times [2021-07-09 18:01:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:48,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7796690] [2021-07-09 18:01:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:48,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:48,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7796690] [2021-07-09 18:01:48,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7796690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34153563] [2021-07-09 18:01:48,380 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 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 [2021-07-09 18:01:48,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:01:48,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:48,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:48,564 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 [2021-07-09 18:01:48,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:48,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:48,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:48,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:01:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:48,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34153563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:48,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:48,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918299442] [2021-07-09 18:01:48,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:48,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:48,637 INFO L87 Difference]: Start difference. First operand 10079 states and 45556 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:49,841 INFO L93 Difference]: Finished difference Result 11215 states and 50057 transitions. [2021-07-09 18:01:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:01:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:49,878 INFO L225 Difference]: With dead ends: 11215 [2021-07-09 18:01:49,879 INFO L226 Difference]: Without dead ends: 11123 [2021-07-09 18:01:49,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:01:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11123 states. [2021-07-09 18:01:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11123 to 10022. [2021-07-09 18:01:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 4.52230316335695) internal successors, (45318), 10021 states have internal predecessors, (45318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 45318 transitions. [2021-07-09 18:01:50,119 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 45318 transitions. Word has length 33 [2021-07-09 18:01:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:50,119 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 45318 transitions. [2021-07-09 18:01:50,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 45318 transitions. [2021-07-09 18:01:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:50,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:50,141 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, 1, 1, 1] [2021-07-09 18:01:50,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-09 18:01:50,342 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1464921280, now seen corresponding path program 6 times [2021-07-09 18:01:50,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:50,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425744791] [2021-07-09 18:01:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:50,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:50,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425744791] [2021-07-09 18:01:50,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425744791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:50,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412703243] [2021-07-09 18:01:50,533 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 [2021-07-09 18:01:50,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:50,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:50,772 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:01:50,772 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 27 treesize of output 55 [2021-07-09 18:01:50,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:01:50,809 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-07-09 18:01:50,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:50,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-07-09 18:01:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:50,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412703243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:50,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:50,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:50,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863002962] [2021-07-09 18:01:50,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:50,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:50,945 INFO L87 Difference]: Start difference. First operand 10022 states and 45318 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:52,345 INFO L93 Difference]: Finished difference Result 10925 states and 48921 transitions. [2021-07-09 18:01:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:01:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:52,379 INFO L225 Difference]: With dead ends: 10925 [2021-07-09 18:01:52,379 INFO L226 Difference]: Without dead ends: 10864 [2021-07-09 18:01:52,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1166.9ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:01:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2021-07-09 18:01:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 9970. [2021-07-09 18:01:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9969 states have (on average 4.523322299127295) internal successors, (45093), 9969 states have internal predecessors, (45093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 45093 transitions. [2021-07-09 18:01:52,657 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 45093 transitions. Word has length 33 [2021-07-09 18:01:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:52,657 INFO L482 AbstractCegarLoop]: Abstraction has 9970 states and 45093 transitions. [2021-07-09 18:01:52,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 45093 transitions. [2021-07-09 18:01:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:52,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:52,679 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, 1, 1, 1] [2021-07-09 18:01:52,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:52,880 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1911888498, now seen corresponding path program 7 times [2021-07-09 18:01:52,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:52,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365333038] [2021-07-09 18:01:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:53,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:53,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365333038] [2021-07-09 18:01:53,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365333038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:53,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919312944] [2021-07-09 18:01:53,050 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 [2021-07-09 18:01:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:53,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:53,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:01:53,202 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 29 treesize of output 13 [2021-07-09 18:01:53,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:53,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:53,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:53,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:01:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:53,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919312944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:53,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:53,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:01:53,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852988613] [2021-07-09 18:01:53,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:01:53,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:01:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:01:53,291 INFO L87 Difference]: Start difference. First operand 9970 states and 45093 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:54,707 INFO L93 Difference]: Finished difference Result 11300 states and 50531 transitions. [2021-07-09 18:01:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:01:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:54,743 INFO L225 Difference]: With dead ends: 11300 [2021-07-09 18:01:54,743 INFO L226 Difference]: Without dead ends: 11269 [2021-07-09 18:01:54,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1090.8ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:01:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-07-09 18:01:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 10052. [2021-07-09 18:01:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 4.521838623022584) internal successors, (45449), 10051 states have internal predecessors, (45449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 45449 transitions. [2021-07-09 18:01:55,003 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 45449 transitions. Word has length 33 [2021-07-09 18:01:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:55,003 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 45449 transitions. [2021-07-09 18:01:55,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 45449 transitions. [2021-07-09 18:01:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:55,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:55,025 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, 1, 1, 1, 1, 1] [2021-07-09 18:01:55,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-09 18:01:55,225 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash -608615892, now seen corresponding path program 8 times [2021-07-09 18:01:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:55,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408288529] [2021-07-09 18:01:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:55,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:55,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408288529] [2021-07-09 18:01:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408288529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118749113] [2021-07-09 18:01:55,400 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 [2021-07-09 18:01:55,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:55,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:55,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:55,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:01:55,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:55,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:55,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:55,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:01:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:55,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118749113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:55,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:55,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:55,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721007954] [2021-07-09 18:01:55,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:55,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:55,781 INFO L87 Difference]: Start difference. First operand 10052 states and 45449 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,917 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-07-09 18:01:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:57,190 INFO L93 Difference]: Finished difference Result 10700 states and 47984 transitions. [2021-07-09 18:01:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:01:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:57,227 INFO L225 Difference]: With dead ends: 10700 [2021-07-09 18:01:57,227 INFO L226 Difference]: Without dead ends: 10683 [2021-07-09 18:01:57,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1251.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1807, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:01:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2021-07-09 18:01:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 10052. [2021-07-09 18:01:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 4.521142174907969) internal successors, (45442), 10051 states have internal predecessors, (45442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 45442 transitions. [2021-07-09 18:01:57,475 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 45442 transitions. Word has length 33 [2021-07-09 18:01:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:57,475 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 45442 transitions. [2021-07-09 18:01:57,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 45442 transitions. [2021-07-09 18:01:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:01:57,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:57,496 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, 1, 1, 1] [2021-07-09 18:01:57,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:57,696 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1507977964, now seen corresponding path program 9 times [2021-07-09 18:01:57,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:57,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213699140] [2021-07-09 18:01:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:57,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:57,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213699140] [2021-07-09 18:01:57,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213699140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:57,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814186927] [2021-07-09 18:01:57,866 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 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 [2021-07-09 18:01:57,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:01:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:57,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:58,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:01:58,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:01:58,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:01:58,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:01:58,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:01:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814186927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:58,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:58,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:01:58,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311467435] [2021-07-09 18:01:58,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:01:58,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:58,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:01:58,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:01:58,240 INFO L87 Difference]: Start difference. First operand 10052 states and 45442 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,780 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-07-09 18:01:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:59,961 INFO L93 Difference]: Finished difference Result 10827 states and 48471 transitions. [2021-07-09 18:01:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:01:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:01:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:00,001 INFO L225 Difference]: With dead ends: 10827 [2021-07-09 18:02:00,001 INFO L226 Difference]: Without dead ends: 10804 [2021-07-09 18:02:00,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1441.1ms TimeCoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-07-09 18:02:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10052. [2021-07-09 18:02:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 4.521142174907969) internal successors, (45442), 10051 states have internal predecessors, (45442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 45442 transitions. [2021-07-09 18:02:00,232 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 45442 transitions. Word has length 33 [2021-07-09 18:02:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:00,232 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 45442 transitions. [2021-07-09 18:02:00,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 45442 transitions. [2021-07-09 18:02:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:00,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:00,252 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, 1, 1, 1] [2021-07-09 18:02:00,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-09 18:02:00,453 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1006391030, now seen corresponding path program 10 times [2021-07-09 18:02:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:00,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768430898] [2021-07-09 18:02:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768430898] [2021-07-09 18:02:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768430898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323678388] [2021-07-09 18:02:00,630 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 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 [2021-07-09 18:02:00,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:00,785 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 [2021-07-09 18:02:00,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:00,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:00,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:00,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323678388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:00,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733081937] [2021-07-09 18:02:00,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:00,878 INFO L87 Difference]: Start difference. First operand 10052 states and 45442 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:01,885 INFO L93 Difference]: Finished difference Result 11029 states and 49362 transitions. [2021-07-09 18:02:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:02:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:01,921 INFO L225 Difference]: With dead ends: 11029 [2021-07-09 18:02:01,921 INFO L226 Difference]: Without dead ends: 10958 [2021-07-09 18:02:01,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:02:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10958 states. [2021-07-09 18:02:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10958 to 10003. [2021-07-09 18:02:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10002 states have (on average 4.521995600879824) internal successors, (45229), 10002 states have internal predecessors, (45229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 45229 transitions. [2021-07-09 18:02:02,161 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 45229 transitions. Word has length 33 [2021-07-09 18:02:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:02,162 INFO L482 AbstractCegarLoop]: Abstraction has 10003 states and 45229 transitions. [2021-07-09 18:02:02,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 45229 transitions. [2021-07-09 18:02:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:02,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:02,184 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, 1, 1, 1] [2021-07-09 18:02:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:02,384 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:02,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1400826684, now seen corresponding path program 11 times [2021-07-09 18:02:02,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:02,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473201410] [2021-07-09 18:02:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:02,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473201410] [2021-07-09 18:02:02,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473201410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071599761] [2021-07-09 18:02:02,555 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 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 [2021-07-09 18:02:02,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:02,708 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 [2021-07-09 18:02:02,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:02,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:02,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:02,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071599761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:02,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:02,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580764427] [2021-07-09 18:02:02,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:02,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:02,804 INFO L87 Difference]: Start difference. First operand 10003 states and 45229 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:04,052 INFO L93 Difference]: Finished difference Result 10904 states and 48996 transitions. [2021-07-09 18:02:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:02:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:04,088 INFO L225 Difference]: With dead ends: 10904 [2021-07-09 18:02:04,088 INFO L226 Difference]: Without dead ends: 10863 [2021-07-09 18:02:04,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:02:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2021-07-09 18:02:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 9988. [2021-07-09 18:02:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 4.523881045358967) internal successors, (45180), 9987 states have internal predecessors, (45180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 45180 transitions. [2021-07-09 18:02:04,318 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 45180 transitions. Word has length 33 [2021-07-09 18:02:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:04,319 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 45180 transitions. [2021-07-09 18:02:04,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 45180 transitions. [2021-07-09 18:02:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:04,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:04,340 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, 1, 1, 1] [2021-07-09 18:02:04,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-09 18:02:04,541 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 352054282, now seen corresponding path program 12 times [2021-07-09 18:02:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:04,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123825595] [2021-07-09 18:02:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123825595] [2021-07-09 18:02:04,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123825595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101115062] [2021-07-09 18:02:04,754 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 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 [2021-07-09 18:02:04,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:04,990 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:02:04,991 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 29 treesize of output 57 [2021-07-09 18:02:04,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:05,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:05,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:05,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-07-09 18:02:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:05,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101115062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:05,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:05,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:02:05,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049680755] [2021-07-09 18:02:05,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:05,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:05,186 INFO L87 Difference]: Start difference. First operand 9988 states and 45180 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:06,756 INFO L93 Difference]: Finished difference Result 10908 states and 48736 transitions. [2021-07-09 18:02:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:02:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:06,791 INFO L225 Difference]: With dead ends: 10908 [2021-07-09 18:02:06,791 INFO L226 Difference]: Without dead ends: 10877 [2021-07-09 18:02:06,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1234.8ms TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2021-07-09 18:02:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 10058. [2021-07-09 18:02:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 4.522720493188824) internal successors, (45485), 10057 states have internal predecessors, (45485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 45485 transitions. [2021-07-09 18:02:07,085 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 45485 transitions. Word has length 33 [2021-07-09 18:02:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:07,085 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 45485 transitions. [2021-07-09 18:02:07,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 45485 transitions. [2021-07-09 18:02:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:07,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:07,107 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, 1, 1, 1] [2021-07-09 18:02:07,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-09 18:02:07,308 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1655326888, now seen corresponding path program 13 times [2021-07-09 18:02:07,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:07,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819512255] [2021-07-09 18:02:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819512255] [2021-07-09 18:02:07,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819512255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193026777] [2021-07-09 18:02:07,480 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 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 [2021-07-09 18:02:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:07,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:07,645 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 [2021-07-09 18:02:07,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:07,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:07,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:07,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193026777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:07,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352192899] [2021-07-09 18:02:07,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:07,741 INFO L87 Difference]: Start difference. First operand 10058 states and 45485 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:08,905 INFO L93 Difference]: Finished difference Result 11081 states and 49544 transitions. [2021-07-09 18:02:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:02:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:08,940 INFO L225 Difference]: With dead ends: 11081 [2021-07-09 18:02:08,940 INFO L226 Difference]: Without dead ends: 11058 [2021-07-09 18:02:08,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 884.5ms TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:02:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11058 states. [2021-07-09 18:02:09,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11058 to 10062. [2021-07-09 18:02:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.521618129410595) internal successors, (45492), 10061 states have internal predecessors, (45492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45492 transitions. [2021-07-09 18:02:09,173 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45492 transitions. Word has length 33 [2021-07-09 18:02:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:09,173 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45492 transitions. [2021-07-09 18:02:09,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45492 transitions. [2021-07-09 18:02:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:09,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:09,195 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, 1, 1, 1] [2021-07-09 18:02:09,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:09,396 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -13066554, now seen corresponding path program 14 times [2021-07-09 18:02:09,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:09,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088958762] [2021-07-09 18:02:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:09,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088958762] [2021-07-09 18:02:09,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088958762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349609240] [2021-07-09 18:02:09,569 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 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 [2021-07-09 18:02:09,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:09,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:09,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:02:09,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:09,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:09,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:09,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:02:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349609240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:09,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:02:09,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551912564] [2021-07-09 18:02:09,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:09,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:09,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:09,889 INFO L87 Difference]: Start difference. First operand 10062 states and 45492 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:11,116 INFO L93 Difference]: Finished difference Result 10746 states and 48090 transitions. [2021-07-09 18:02:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:02:11,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:11,148 INFO L225 Difference]: With dead ends: 10746 [2021-07-09 18:02:11,149 INFO L226 Difference]: Without dead ends: 10728 [2021-07-09 18:02:11,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:02:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-07-09 18:02:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10058. [2021-07-09 18:02:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 4.522024460574724) internal successors, (45478), 10057 states have internal predecessors, (45478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 45478 transitions. [2021-07-09 18:02:11,375 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 45478 transitions. Word has length 33 [2021-07-09 18:02:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:11,375 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 45478 transitions. [2021-07-09 18:02:11,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 45478 transitions. [2021-07-09 18:02:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:11,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:11,396 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, 1, 1, 1] [2021-07-09 18:02:11,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-09 18:02:11,597 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1601940368, now seen corresponding path program 15 times [2021-07-09 18:02:11,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:11,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744775950] [2021-07-09 18:02:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:11,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744775950] [2021-07-09 18:02:11,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744775950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237504370] [2021-07-09 18:02:11,767 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 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 [2021-07-09 18:02:11,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:11,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:11,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:11,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:02:11,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:11,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:11,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:11,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:02:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237504370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:12,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:02:12,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506583682] [2021-07-09 18:02:12,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:12,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:12,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:12,090 INFO L87 Difference]: Start difference. First operand 10058 states and 45478 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:13,325 INFO L93 Difference]: Finished difference Result 10718 states and 48037 transitions. [2021-07-09 18:02:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:02:13,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:13,358 INFO L225 Difference]: With dead ends: 10718 [2021-07-09 18:02:13,359 INFO L226 Difference]: Without dead ends: 10667 [2021-07-09 18:02:13,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1078.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:02:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10667 states. [2021-07-09 18:02:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10667 to 10009. [2021-07-09 18:02:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 4.523181454836131) internal successors, (45268), 10008 states have internal predecessors, (45268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 45268 transitions. [2021-07-09 18:02:13,656 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 45268 transitions. Word has length 33 [2021-07-09 18:02:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:13,656 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 45268 transitions. [2021-07-09 18:02:13,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 45268 transitions. [2021-07-09 18:02:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:13,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:13,678 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, 1, 1, 1] [2021-07-09 18:02:13,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-07-09 18:02:13,879 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash 871286602, now seen corresponding path program 16 times [2021-07-09 18:02:13,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:13,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428698079] [2021-07-09 18:02:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:14,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428698079] [2021-07-09 18:02:14,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428698079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413023922] [2021-07-09 18:02:14,054 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 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 [2021-07-09 18:02:14,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:14,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:14,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:14,216 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 29 treesize of output 13 [2021-07-09 18:02:14,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:14,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:14,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:14,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:02:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413023922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:14,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:14,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785781241] [2021-07-09 18:02:14,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:14,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:14,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:14,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:14,310 INFO L87 Difference]: Start difference. First operand 10009 states and 45268 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:15,765 INFO L93 Difference]: Finished difference Result 10890 states and 48869 transitions. [2021-07-09 18:02:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:02:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:15,798 INFO L225 Difference]: With dead ends: 10890 [2021-07-09 18:02:15,798 INFO L226 Difference]: Without dead ends: 10850 [2021-07-09 18:02:15,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1165.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:02:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2021-07-09 18:02:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 10012. [2021-07-09 18:02:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 10011 states have (on average 4.5224253321346515) internal successors, (45274), 10011 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 45274 transitions. [2021-07-09 18:02:16,027 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 45274 transitions. Word has length 33 [2021-07-09 18:02:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:16,027 INFO L482 AbstractCegarLoop]: Abstraction has 10012 states and 45274 transitions. [2021-07-09 18:02:16,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 45274 transitions. [2021-07-09 18:02:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:16,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:16,048 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, 1, 1, 1] [2021-07-09 18:02:16,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-07-09 18:02:16,248 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash 307689178, now seen corresponding path program 17 times [2021-07-09 18:02:16,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:16,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324693497] [2021-07-09 18:02:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:16,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324693497] [2021-07-09 18:02:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324693497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321103659] [2021-07-09 18:02:16,423 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 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 [2021-07-09 18:02:16,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:16,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:16,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:16,575 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 [2021-07-09 18:02:16,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:16,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:16,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:16,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321103659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:16,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:16,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71772130] [2021-07-09 18:02:16,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:16,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:16,666 INFO L87 Difference]: Start difference. First operand 10012 states and 45274 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:18,125 INFO L93 Difference]: Finished difference Result 11164 states and 50027 transitions. [2021-07-09 18:02:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:02:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:18,157 INFO L225 Difference]: With dead ends: 11164 [2021-07-09 18:02:18,157 INFO L226 Difference]: Without dead ends: 11113 [2021-07-09 18:02:18,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1207.4ms TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:02:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2021-07-09 18:02:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 9988. [2021-07-09 18:02:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 4.523881045358967) internal successors, (45180), 9987 states have internal predecessors, (45180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 45180 transitions. [2021-07-09 18:02:18,365 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 45180 transitions. Word has length 33 [2021-07-09 18:02:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:18,365 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 45180 transitions. [2021-07-09 18:02:18,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 45180 transitions. [2021-07-09 18:02:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:18,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:18,385 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, 1, 1, 1, 1, 1] [2021-07-09 18:02:18,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-09 18:02:18,586 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash 49748224, now seen corresponding path program 18 times [2021-07-09 18:02:18,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:18,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091886042] [2021-07-09 18:02:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:18,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091886042] [2021-07-09 18:02:18,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091886042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451572406] [2021-07-09 18:02:18,754 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 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 [2021-07-09 18:02:18,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:18,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:18,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:18,979 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:02:18,979 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 31 treesize of output 59 [2021-07-09 18:02:18,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:18,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:18,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:18,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:51 [2021-07-09 18:02:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:19,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451572406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:19,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:19,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:02:19,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858744521] [2021-07-09 18:02:19,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:19,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:19,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:19,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:19,155 INFO L87 Difference]: Start difference. First operand 9988 states and 45180 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:20,825 INFO L93 Difference]: Finished difference Result 11171 states and 49992 transitions. [2021-07-09 18:02:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:02:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:20,860 INFO L225 Difference]: With dead ends: 11171 [2021-07-09 18:02:20,860 INFO L226 Difference]: Without dead ends: 11152 [2021-07-09 18:02:20,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:02:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11152 states. [2021-07-09 18:02:21,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11152 to 10088. [2021-07-09 18:02:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10088 states, 10087 states have (on average 4.525825319718449) internal successors, (45652), 10087 states have internal predecessors, (45652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 45652 transitions. [2021-07-09 18:02:21,067 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 45652 transitions. Word has length 33 [2021-07-09 18:02:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:21,067 INFO L482 AbstractCegarLoop]: Abstraction has 10088 states and 45652 transitions. [2021-07-09 18:02:21,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 45652 transitions. [2021-07-09 18:02:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:21,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:21,087 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, 1, 1, 1] [2021-07-09 18:02:21,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,288 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1353020830, now seen corresponding path program 19 times [2021-07-09 18:02:21,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:21,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79047086] [2021-07-09 18:02:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79047086] [2021-07-09 18:02:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79047086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924811321] [2021-07-09 18:02:21,449 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 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 [2021-07-09 18:02:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:21,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:21,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 18:02:21,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:21,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:21,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:21,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 18:02:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924811321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:21,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:21,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567066934] [2021-07-09 18:02:21,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:21,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:21,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:21,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:21,697 INFO L87 Difference]: Start difference. First operand 10088 states and 45652 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:22,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:22,718 INFO L93 Difference]: Finished difference Result 11480 states and 51160 transitions. [2021-07-09 18:02:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:02:22,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:22,755 INFO L225 Difference]: With dead ends: 11480 [2021-07-09 18:02:22,755 INFO L226 Difference]: Without dead ends: 11465 [2021-07-09 18:02:22,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 705.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:02:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11465 states. [2021-07-09 18:02:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11465 to 10094. [2021-07-09 18:02:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.525215495888239) internal successors, (45673), 10093 states have internal predecessors, (45673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45673 transitions. [2021-07-09 18:02:23,011 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45673 transitions. Word has length 33 [2021-07-09 18:02:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:23,011 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45673 transitions. [2021-07-09 18:02:23,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45673 transitions. [2021-07-09 18:02:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:23,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:23,032 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, 1, 1, 1] [2021-07-09 18:02:23,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-07-09 18:02:23,232 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -315372612, now seen corresponding path program 20 times [2021-07-09 18:02:23,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:23,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502207941] [2021-07-09 18:02:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:23,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:23,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502207941] [2021-07-09 18:02:23,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502207941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:23,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757604933] [2021-07-09 18:02:23,395 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 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 [2021-07-09 18:02:23,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:23,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:23,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:02:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:23,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:02:23,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:23,572 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 [2021-07-09 18:02:23,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:23,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:23,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:23,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:30 [2021-07-09 18:02:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:23,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757604933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:23,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:23,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:02:23,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17061183] [2021-07-09 18:02:23,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:23,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:23,708 INFO L87 Difference]: Start difference. First operand 10094 states and 45673 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:24,791 INFO L93 Difference]: Finished difference Result 11006 states and 49259 transitions. [2021-07-09 18:02:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:02:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:24,825 INFO L225 Difference]: With dead ends: 11006 [2021-07-09 18:02:24,825 INFO L226 Difference]: Without dead ends: 10992 [2021-07-09 18:02:24,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:02:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2021-07-09 18:02:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 10094. [2021-07-09 18:02:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.524918260180323) internal successors, (45670), 10093 states have internal predecessors, (45670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45670 transitions. [2021-07-09 18:02:25,057 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45670 transitions. Word has length 33 [2021-07-09 18:02:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:25,057 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45670 transitions. [2021-07-09 18:02:25,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45670 transitions. [2021-07-09 18:02:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:25,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:25,077 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, 1, 1, 1] [2021-07-09 18:02:25,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-09 18:02:25,278 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:25,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1299634310, now seen corresponding path program 21 times [2021-07-09 18:02:25,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:25,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351090935] [2021-07-09 18:02:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:25,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:25,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351090935] [2021-07-09 18:02:25,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351090935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:25,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530199188] [2021-07-09 18:02:25,440 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 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 [2021-07-09 18:02:25,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:25,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:25,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:02:25,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:25,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:25,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:25,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-07-09 18:02:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:25,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530199188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:25,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:25,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:02:25,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92615537] [2021-07-09 18:02:25,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:25,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:25,750 INFO L87 Difference]: Start difference. First operand 10094 states and 45670 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:27,062 INFO L93 Difference]: Finished difference Result 11095 states and 49617 transitions. [2021-07-09 18:02:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:02:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:27,095 INFO L225 Difference]: With dead ends: 11095 [2021-07-09 18:02:27,095 INFO L226 Difference]: Without dead ends: 11072 [2021-07-09 18:02:27,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1044.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:02:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2021-07-09 18:02:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 10045. [2021-07-09 18:02:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.525089605734767) internal successors, (45450), 10044 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45450 transitions. [2021-07-09 18:02:27,395 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45450 transitions. Word has length 33 [2021-07-09 18:02:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:27,395 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45450 transitions. [2021-07-09 18:02:27,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45450 transitions. [2021-07-09 18:02:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:27,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:27,424 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, 1, 1, 1] [2021-07-09 18:02:27,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-09 18:02:27,629 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash -932503890, now seen corresponding path program 22 times [2021-07-09 18:02:27,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:27,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108348089] [2021-07-09 18:02:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:27,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:27,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108348089] [2021-07-09 18:02:27,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108348089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:27,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521872408] [2021-07-09 18:02:27,799 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 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 [2021-07-09 18:02:27,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:27,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:27,978 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 [2021-07-09 18:02:27,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:27,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:27,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:27,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 18:02:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521872408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:28,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:28,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547259786] [2021-07-09 18:02:28,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:28,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:28,058 INFO L87 Difference]: Start difference. First operand 10045 states and 45450 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:29,384 INFO L93 Difference]: Finished difference Result 11215 states and 50280 transitions. [2021-07-09 18:02:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:02:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:29,419 INFO L225 Difference]: With dead ends: 11215 [2021-07-09 18:02:29,420 INFO L226 Difference]: Without dead ends: 11200 [2021-07-09 18:02:29,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 967.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:02:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11200 states. [2021-07-09 18:02:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11200 to 10045. [2021-07-09 18:02:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.525089605734767) internal successors, (45450), 10044 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45450 transitions. [2021-07-09 18:02:29,653 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45450 transitions. Word has length 33 [2021-07-09 18:02:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:29,653 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45450 transitions. [2021-07-09 18:02:29,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45450 transitions. [2021-07-09 18:02:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:29,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:29,673 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, 1, 1, 1] [2021-07-09 18:02:29,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 18:02:29,873 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1152088908, now seen corresponding path program 23 times [2021-07-09 18:02:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:29,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139448614] [2021-07-09 18:02:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:30,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:30,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139448614] [2021-07-09 18:02:30,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139448614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:30,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399205482] [2021-07-09 18:02:30,038 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 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 [2021-07-09 18:02:30,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:30,218 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 29 treesize of output 13 [2021-07-09 18:02:30,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:30,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:30,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:30,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-07-09 18:02:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:30,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399205482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:30,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:30,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:30,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149931881] [2021-07-09 18:02:30,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:30,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:30,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:30,289 INFO L87 Difference]: Start difference. First operand 10045 states and 45450 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:31,511 INFO L93 Difference]: Finished difference Result 11357 states and 50694 transitions. [2021-07-09 18:02:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:02:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:31,547 INFO L225 Difference]: With dead ends: 11357 [2021-07-09 18:02:31,547 INFO L226 Difference]: Without dead ends: 11343 [2021-07-09 18:02:31,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:02:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11343 states. [2021-07-09 18:02:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11343 to 10030. [2021-07-09 18:02:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10030 states, 10029 states have (on average 4.526273805962708) internal successors, (45394), 10029 states have internal predecessors, (45394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 45394 transitions. [2021-07-09 18:02:31,798 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 45394 transitions. Word has length 33 [2021-07-09 18:02:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:31,798 INFO L482 AbstractCegarLoop]: Abstraction has 10030 states and 45394 transitions. [2021-07-09 18:02:31,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 45394 transitions. [2021-07-09 18:02:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:31,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:31,820 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, 1, 1, 1] [2021-07-09 18:02:32,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:32,020 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1142951876, now seen corresponding path program 24 times [2021-07-09 18:02:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:32,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431673160] [2021-07-09 18:02:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:32,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431673160] [2021-07-09 18:02:32,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431673160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:32,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510690339] [2021-07-09 18:02:32,190 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 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 [2021-07-09 18:02:32,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:32,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:32,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:32,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:32,479 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 29 treesize of output 57 [2021-07-09 18:02:32,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:32,510 INFO L628 ElimStorePlain]: treesize reduction 41, result has 47.4 percent of original size [2021-07-09 18:02:32,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:32,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:37 [2021-07-09 18:02:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:32,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510690339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:32,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:32,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:02:32,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586983286] [2021-07-09 18:02:32,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:02:32,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:02:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:02:32,626 INFO L87 Difference]: Start difference. First operand 10030 states and 45394 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:34,181 INFO L93 Difference]: Finished difference Result 10819 states and 48610 transitions. [2021-07-09 18:02:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:02:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:34,216 INFO L225 Difference]: With dead ends: 10819 [2021-07-09 18:02:34,216 INFO L226 Difference]: Without dead ends: 10804 [2021-07-09 18:02:34,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1104.6ms TimeCoverageRelationStatistics Valid=206, Invalid=2146, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-07-09 18:02:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10015. [2021-07-09 18:02:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 4.526662672258838) internal successors, (45330), 10014 states have internal predecessors, (45330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 45330 transitions. [2021-07-09 18:02:34,492 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 45330 transitions. Word has length 33 [2021-07-09 18:02:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:34,492 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 45330 transitions. [2021-07-09 18:02:34,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 45330 transitions. [2021-07-09 18:02:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:34,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:34,513 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, 1, 1, 1] [2021-07-09 18:02:34,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-09 18:02:34,713 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1999035844, now seen corresponding path program 25 times [2021-07-09 18:02:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:34,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999383620] [2021-07-09 18:02:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:34,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999383620] [2021-07-09 18:02:34,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999383620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036295706] [2021-07-09 18:02:34,881 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 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 [2021-07-09 18:02:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:34,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:34,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:35,030 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 [2021-07-09 18:02:35,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:35,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:35,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:35,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:35,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036295706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:35,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:35,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:35,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437587075] [2021-07-09 18:02:35,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:35,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:35,119 INFO L87 Difference]: Start difference. First operand 10015 states and 45330 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:36,409 INFO L93 Difference]: Finished difference Result 11513 states and 51424 transitions. [2021-07-09 18:02:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:36,444 INFO L225 Difference]: With dead ends: 11513 [2021-07-09 18:02:36,445 INFO L226 Difference]: Without dead ends: 11494 [2021-07-09 18:02:36,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1012.1ms TimeCoverageRelationStatistics Valid=424, Invalid=1928, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-07-09 18:02:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10094. [2021-07-09 18:02:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.5270979887050435) internal successors, (45692), 10093 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45692 transitions. [2021-07-09 18:02:36,690 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45692 transitions. Word has length 33 [2021-07-09 18:02:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:36,690 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45692 transitions. [2021-07-09 18:02:36,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45692 transitions. [2021-07-09 18:02:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:36,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:36,712 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, 1, 1, 1] [2021-07-09 18:02:36,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:36,912 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:36,913 INFO L82 PathProgramCache]: Analyzing trace with hash -992658846, now seen corresponding path program 26 times [2021-07-09 18:02:36,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:36,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235091957] [2021-07-09 18:02:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:37,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235091957] [2021-07-09 18:02:37,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235091957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121021953] [2021-07-09 18:02:37,082 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 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 [2021-07-09 18:02:37,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:37,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:37,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:02:37,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:37,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:37,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:37,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:02:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:37,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121021953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:37,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:37,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:02:37,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822854606] [2021-07-09 18:02:37,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:37,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:37,412 INFO L87 Difference]: Start difference. First operand 10094 states and 45692 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:38,958 INFO L93 Difference]: Finished difference Result 10810 states and 48520 transitions. [2021-07-09 18:02:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:02:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:38,992 INFO L225 Difference]: With dead ends: 10810 [2021-07-09 18:02:38,993 INFO L226 Difference]: Without dead ends: 10797 [2021-07-09 18:02:38,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1259.6ms TimeCoverageRelationStatistics Valid=459, Invalid=1893, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:02:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10797 states. [2021-07-09 18:02:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10797 to 10094. [2021-07-09 18:02:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.526800752997127) internal successors, (45689), 10093 states have internal predecessors, (45689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45689 transitions. [2021-07-09 18:02:39,222 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45689 transitions. Word has length 33 [2021-07-09 18:02:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:39,222 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45689 transitions. [2021-07-09 18:02:39,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45689 transitions. [2021-07-09 18:02:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:39,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:39,243 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, 1, 1, 1] [2021-07-09 18:02:39,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-07-09 18:02:39,443 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:39,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1892020918, now seen corresponding path program 27 times [2021-07-09 18:02:39,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:39,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752390008] [2021-07-09 18:02:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:39,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:39,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752390008] [2021-07-09 18:02:39,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752390008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:39,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215413988] [2021-07-09 18:02:39,616 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 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 [2021-07-09 18:02:39,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:39,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:39,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:39,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:39,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:02:39,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:39,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:39,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:39,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:02:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:39,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215413988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:39,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:39,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:02:39,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333562077] [2021-07-09 18:02:39,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:39,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:39,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:39,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:39,969 INFO L87 Difference]: Start difference. First operand 10094 states and 45689 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:41,679 INFO L93 Difference]: Finished difference Result 10942 states and 49034 transitions. [2021-07-09 18:02:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:02:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:41,713 INFO L225 Difference]: With dead ends: 10942 [2021-07-09 18:02:41,713 INFO L226 Difference]: Without dead ends: 10927 [2021-07-09 18:02:41,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1450.8ms TimeCoverageRelationStatistics Valid=390, Invalid=2060, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:02:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10927 states. [2021-07-09 18:02:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10927 to 10094. [2021-07-09 18:02:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.526800752997127) internal successors, (45689), 10093 states have internal predecessors, (45689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45689 transitions. [2021-07-09 18:02:41,932 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45689 transitions. Word has length 33 [2021-07-09 18:02:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:41,932 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45689 transitions. [2021-07-09 18:02:41,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45689 transitions. [2021-07-09 18:02:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:41,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:41,952 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, 1, 1, 1] [2021-07-09 18:02:42,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-09 18:02:42,153 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash 622348076, now seen corresponding path program 28 times [2021-07-09 18:02:42,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:42,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218665919] [2021-07-09 18:02:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:42,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:42,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218665919] [2021-07-09 18:02:42,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218665919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:42,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170589745] [2021-07-09 18:02:42,321 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 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 [2021-07-09 18:02:42,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:42,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:42,468 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 [2021-07-09 18:02:42,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:42,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:42,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:42,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170589745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:42,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240289213] [2021-07-09 18:02:42,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:42,560 INFO L87 Difference]: Start difference. First operand 10094 states and 45689 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:43,642 INFO L93 Difference]: Finished difference Result 11278 states and 50360 transitions. [2021-07-09 18:02:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:02:43,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:43,676 INFO L225 Difference]: With dead ends: 11278 [2021-07-09 18:02:43,677 INFO L226 Difference]: Without dead ends: 11247 [2021-07-09 18:02:43,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:02:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11247 states. [2021-07-09 18:02:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11247 to 10048. [2021-07-09 18:02:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 4.526624863143227) internal successors, (45479), 10047 states have internal predecessors, (45479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 45479 transitions. [2021-07-09 18:02:43,919 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 45479 transitions. Word has length 33 [2021-07-09 18:02:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:43,919 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 45479 transitions. [2021-07-09 18:02:43,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 45479 transitions. [2021-07-09 18:02:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:43,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:43,939 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, 1, 1, 1] [2021-07-09 18:02:44,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-09 18:02:44,139 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:44,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1016783730, now seen corresponding path program 29 times [2021-07-09 18:02:44,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:44,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378395261] [2021-07-09 18:02:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:44,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:44,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378395261] [2021-07-09 18:02:44,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378395261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:44,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472091333] [2021-07-09 18:02:44,310 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 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 [2021-07-09 18:02:44,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-09 18:02:44,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:44,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:44,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:44,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:44,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472091333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:44,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:44,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:44,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913983281] [2021-07-09 18:02:44,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:44,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:44,642 INFO L87 Difference]: Start difference. First operand 10048 states and 45479 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:45,873 INFO L93 Difference]: Finished difference Result 10994 states and 49401 transitions. [2021-07-09 18:02:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:02:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:45,907 INFO L225 Difference]: With dead ends: 10994 [2021-07-09 18:02:45,908 INFO L226 Difference]: Without dead ends: 10979 [2021-07-09 18:02:45,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:02:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-07-09 18:02:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10024. [2021-07-09 18:02:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 4.526788386710566) internal successors, (45372), 10023 states have internal predecessors, (45372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 45372 transitions. [2021-07-09 18:02:46,129 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 45372 transitions. Word has length 33 [2021-07-09 18:02:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:46,130 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 45372 transitions. [2021-07-09 18:02:46,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 45372 transitions. [2021-07-09 18:02:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:46,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:46,150 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, 1, 1, 1] [2021-07-09 18:02:46,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-09 18:02:46,350 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash -31988672, now seen corresponding path program 30 times [2021-07-09 18:02:46,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522767999] [2021-07-09 18:02:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:46,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:46,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522767999] [2021-07-09 18:02:46,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522767999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:46,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319317004] [2021-07-09 18:02:46,526 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 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 [2021-07-09 18:02:46,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:46,720 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:02:46,721 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 29 treesize of output 57 [2021-07-09 18:02:46,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:46,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:46,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:46,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 18:02:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:46,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319317004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:46,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:46,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:02:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697442664] [2021-07-09 18:02:46,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:02:46,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:02:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:02:46,924 INFO L87 Difference]: Start difference. First operand 10024 states and 45372 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:48,586 INFO L93 Difference]: Finished difference Result 10967 states and 49098 transitions. [2021-07-09 18:02:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:48,622 INFO L225 Difference]: With dead ends: 10967 [2021-07-09 18:02:48,622 INFO L226 Difference]: Without dead ends: 10948 [2021-07-09 18:02:48,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1243.2ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:02:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10948 states. [2021-07-09 18:02:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10948 to 10094. [2021-07-09 18:02:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.52739522441296) internal successors, (45695), 10093 states have internal predecessors, (45695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 45695 transitions. [2021-07-09 18:02:48,863 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 45695 transitions. Word has length 33 [2021-07-09 18:02:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:48,863 INFO L482 AbstractCegarLoop]: Abstraction has 10094 states and 45695 transitions. [2021-07-09 18:02:48,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 45695 transitions. [2021-07-09 18:02:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:48,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:48,885 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, 1, 1, 1] [2021-07-09 18:02:49,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:49,085 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1271283934, now seen corresponding path program 31 times [2021-07-09 18:02:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:49,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551068346] [2021-07-09 18:02:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:49,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:49,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551068346] [2021-07-09 18:02:49,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551068346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:49,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032732412] [2021-07-09 18:02:49,257 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 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 [2021-07-09 18:02:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:49,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:49,404 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 21 treesize of output 13 [2021-07-09 18:02:49,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:49,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:49,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:49,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:49,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032732412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:49,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:49,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:02:49,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403331305] [2021-07-09 18:02:49,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:49,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:49,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:49,497 INFO L87 Difference]: Start difference. First operand 10094 states and 45695 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:50,654 INFO L93 Difference]: Finished difference Result 11355 states and 50696 transitions. [2021-07-09 18:02:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:02:50,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:50,688 INFO L225 Difference]: With dead ends: 11355 [2021-07-09 18:02:50,688 INFO L226 Difference]: Without dead ends: 11340 [2021-07-09 18:02:50,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:02:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11340 states. [2021-07-09 18:02:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11340 to 10097. [2021-07-09 18:02:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.527040412044374) internal successors, (45705), 10096 states have internal predecessors, (45705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45705 transitions. [2021-07-09 18:02:50,926 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45705 transitions. Word has length 33 [2021-07-09 18:02:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:50,927 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45705 transitions. [2021-07-09 18:02:50,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45705 transitions. [2021-07-09 18:02:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:50,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:50,947 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, 1, 1, 1] [2021-07-09 18:02:51,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:51,148 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash -397109508, now seen corresponding path program 32 times [2021-07-09 18:02:51,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:51,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166995072] [2021-07-09 18:02:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:51,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:51,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166995072] [2021-07-09 18:02:51,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166995072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:51,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602555152] [2021-07-09 18:02:51,325 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 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 [2021-07-09 18:02:51,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:51,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:51,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:51,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:51,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:02:51,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:51,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:51,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:51,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:02:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:51,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602555152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:51,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:51,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:02:51,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865754410] [2021-07-09 18:02:51,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:51,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:51,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:51,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:51,796 INFO L87 Difference]: Start difference. First operand 10097 states and 45705 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:53,071 INFO L93 Difference]: Finished difference Result 10865 states and 48670 transitions. [2021-07-09 18:02:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:02:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:53,106 INFO L225 Difference]: With dead ends: 10865 [2021-07-09 18:02:53,106 INFO L226 Difference]: Without dead ends: 10851 [2021-07-09 18:02:53,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=413, Invalid=1567, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:02:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2021-07-09 18:02:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10097. [2021-07-09 18:02:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10096 states have (on average 4.526743264659271) internal successors, (45702), 10096 states have internal predecessors, (45702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 45702 transitions. [2021-07-09 18:02:53,326 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 45702 transitions. Word has length 33 [2021-07-09 18:02:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:53,326 INFO L482 AbstractCegarLoop]: Abstraction has 10097 states and 45702 transitions. [2021-07-09 18:02:53,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 45702 transitions. [2021-07-09 18:02:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:53,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:53,346 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, 1, 1, 1] [2021-07-09 18:02:53,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:53,547 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1217897414, now seen corresponding path program 33 times [2021-07-09 18:02:53,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:53,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478453818] [2021-07-09 18:02:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:53,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478453818] [2021-07-09 18:02:53,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478453818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319950857] [2021-07-09 18:02:53,719 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 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 [2021-07-09 18:02:53,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:53,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:53,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:53,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:53,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:53,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:02:53,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:53,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:53,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:53,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:02:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:54,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319950857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:54,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:54,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:02:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429458700] [2021-07-09 18:02:54,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:54,049 INFO L87 Difference]: Start difference. First operand 10097 states and 45702 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:55,429 INFO L93 Difference]: Finished difference Result 10842 states and 48625 transitions. [2021-07-09 18:02:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:02:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:55,463 INFO L225 Difference]: With dead ends: 10842 [2021-07-09 18:02:55,463 INFO L226 Difference]: Without dead ends: 10819 [2021-07-09 18:02:55,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1116.9ms TimeCoverageRelationStatistics Valid=396, Invalid=1496, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:02:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2021-07-09 18:02:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 10048. [2021-07-09 18:02:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 4.526923459739225) internal successors, (45482), 10047 states have internal predecessors, (45482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 45482 transitions. [2021-07-09 18:02:55,682 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 45482 transitions. Word has length 33 [2021-07-09 18:02:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:55,682 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 45482 transitions. [2021-07-09 18:02:55,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 45482 transitions. [2021-07-09 18:02:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:55,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:55,703 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, 1, 1, 1] [2021-07-09 18:02:55,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 18:02:55,903 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 487243648, now seen corresponding path program 34 times [2021-07-09 18:02:55,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:55,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561669019] [2021-07-09 18:02:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:56,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:56,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561669019] [2021-07-09 18:02:56,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561669019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:56,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511547240] [2021-07-09 18:02:56,082 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 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 [2021-07-09 18:02:56,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:56,241 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 [2021-07-09 18:02:56,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:56,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:56,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:56,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:02:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:56,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511547240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:56,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:56,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:56,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855872530] [2021-07-09 18:02:56,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:56,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:56,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:56,337 INFO L87 Difference]: Start difference. First operand 10048 states and 45482 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:57,765 INFO L93 Difference]: Finished difference Result 11015 states and 49399 transitions. [2021-07-09 18:02:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:02:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:02:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:57,801 INFO L225 Difference]: With dead ends: 11015 [2021-07-09 18:02:57,801 INFO L226 Difference]: Without dead ends: 10996 [2021-07-09 18:02:57,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1051.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:02:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10996 states. [2021-07-09 18:02:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10996 to 10045. [2021-07-09 18:02:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.527279968140183) internal successors, (45472), 10044 states have internal predecessors, (45472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45472 transitions. [2021-07-09 18:02:58,038 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45472 transitions. Word has length 33 [2021-07-09 18:02:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:58,038 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45472 transitions. [2021-07-09 18:02:58,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45472 transitions. [2021-07-09 18:02:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:02:58,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:58,060 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, 1, 1, 1] [2021-07-09 18:02:58,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-09 18:02:58,260 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash -76353776, now seen corresponding path program 35 times [2021-07-09 18:02:58,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:58,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770669763] [2021-07-09 18:02:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:58,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770669763] [2021-07-09 18:02:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770669763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154270451] [2021-07-09 18:02:58,516 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 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 [2021-07-09 18:02:58,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:58,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:58,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:02:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:58,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:02:58,676 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 29 treesize of output 13 [2021-07-09 18:02:58,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:02:58,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:02:58,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:02:58,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:02:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154270451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:58,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:02:58,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704786789] [2021-07-09 18:02:58,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:58,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:58,772 INFO L87 Difference]: Start difference. First operand 10045 states and 45472 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:00,122 INFO L93 Difference]: Finished difference Result 11489 states and 51265 transitions. [2021-07-09 18:03:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:03:00,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:00,158 INFO L225 Difference]: With dead ends: 11489 [2021-07-09 18:03:00,158 INFO L226 Difference]: Without dead ends: 11466 [2021-07-09 18:03:00,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1072.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:03:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11466 states. [2021-07-09 18:03:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11466 to 10033. [2021-07-09 18:03:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10033 states, 10032 states have (on average 4.527811004784689) internal successors, (45423), 10032 states have internal predecessors, (45423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10033 states to 10033 states and 45423 transitions. [2021-07-09 18:03:00,410 INFO L78 Accepts]: Start accepts. Automaton has 10033 states and 45423 transitions. Word has length 33 [2021-07-09 18:03:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:00,410 INFO L482 AbstractCegarLoop]: Abstraction has 10033 states and 45423 transitions. [2021-07-09 18:03:00,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10033 states and 45423 transitions. [2021-07-09 18:03:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:00,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:00,431 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, 1, 1, 1] [2021-07-09 18:03:00,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:00,632 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1872903246, now seen corresponding path program 36 times [2021-07-09 18:03:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:00,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839469191] [2021-07-09 18:03:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:00,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:00,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839469191] [2021-07-09 18:03:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839469191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:00,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540052982] [2021-07-09 18:03:00,798 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 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 [2021-07-09 18:03:00,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:03:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:01,025 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:03:01,026 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 31 treesize of output 59 [2021-07-09 18:03:01,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:01,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:01,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:01,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:51 [2021-07-09 18:03:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540052982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:01,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:03:01,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631031369] [2021-07-09 18:03:01,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:01,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:01,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:01,209 INFO L87 Difference]: Start difference. First operand 10033 states and 45423 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:02,603 INFO L93 Difference]: Finished difference Result 10934 states and 49015 transitions. [2021-07-09 18:03:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:03:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:02,637 INFO L225 Difference]: With dead ends: 10934 [2021-07-09 18:03:02,638 INFO L226 Difference]: Without dead ends: 10915 [2021-07-09 18:03:02,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1023.6ms TimeCoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:03:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10915 states. [2021-07-09 18:03:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10915 to 10154. [2021-07-09 18:03:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 4.529892642568699) internal successors, (45992), 10153 states have internal predecessors, (45992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 45992 transitions. [2021-07-09 18:03:02,870 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 45992 transitions. Word has length 33 [2021-07-09 18:03:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:02,871 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 45992 transitions. [2021-07-09 18:03:02,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 45992 transitions. [2021-07-09 18:03:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:02,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:02,893 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, 1, 1, 1] [2021-07-09 18:03:03,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-07-09 18:03:03,093 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1118791444, now seen corresponding path program 37 times [2021-07-09 18:03:03,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:03,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453136525] [2021-07-09 18:03:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:03,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:03,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453136525] [2021-07-09 18:03:03,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453136525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:03,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167819833] [2021-07-09 18:03:03,257 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 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 [2021-07-09 18:03:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:03,432 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 [2021-07-09 18:03:03,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:03,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:03,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:03,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 18:03:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:03,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167819833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:03,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:03,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:03,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875788714] [2021-07-09 18:03:03,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:03,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:03,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:03,512 INFO L87 Difference]: Start difference. First operand 10154 states and 45992 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:04,484 INFO L93 Difference]: Finished difference Result 11232 states and 50188 transitions. [2021-07-09 18:03:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:03:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:04,521 INFO L225 Difference]: With dead ends: 11232 [2021-07-09 18:03:04,521 INFO L226 Difference]: Without dead ends: 11217 [2021-07-09 18:03:04,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:03:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11217 states. [2021-07-09 18:03:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11217 to 10163. [2021-07-09 18:03:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.528931312733714) internal successors, (46023), 10162 states have internal predecessors, (46023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 46023 transitions. [2021-07-09 18:03:04,780 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 46023 transitions. Word has length 33 [2021-07-09 18:03:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:04,780 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 46023 transitions. [2021-07-09 18:03:04,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 46023 transitions. [2021-07-09 18:03:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:04,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:04,801 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, 1, 1, 1] [2021-07-09 18:03:05,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:05,001 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:05,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1507782410, now seen corresponding path program 38 times [2021-07-09 18:03:05,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:05,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461106707] [2021-07-09 18:03:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:05,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:05,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461106707] [2021-07-09 18:03:05,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461106707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:05,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746564678] [2021-07-09 18:03:05,253 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 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 [2021-07-09 18:03:05,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:03:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:05,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:05,431 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 [2021-07-09 18:03:05,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:05,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:05,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:05,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-07-09 18:03:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:05,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746564678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:05,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:05,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:03:05,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898975982] [2021-07-09 18:03:05,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:03:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:03:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:03:05,565 INFO L87 Difference]: Start difference. First operand 10163 states and 46023 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:06,342 INFO L93 Difference]: Finished difference Result 10788 states and 48389 transitions. [2021-07-09 18:03:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:03:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:06,375 INFO L225 Difference]: With dead ends: 10788 [2021-07-09 18:03:06,375 INFO L226 Difference]: Without dead ends: 10774 [2021-07-09 18:03:06,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:03:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10774 states. [2021-07-09 18:03:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10774 to 10163. [2021-07-09 18:03:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.528636095256839) internal successors, (46020), 10162 states have internal predecessors, (46020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 46020 transitions. [2021-07-09 18:03:06,601 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 46020 transitions. Word has length 33 [2021-07-09 18:03:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:06,601 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 46020 transitions. [2021-07-09 18:03:06,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 46020 transitions. [2021-07-09 18:03:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:06,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:06,623 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, 1, 1, 1] [2021-07-09 18:03:06,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-07-09 18:03:06,824 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1172177964, now seen corresponding path program 39 times [2021-07-09 18:03:06,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:06,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162101994] [2021-07-09 18:03:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:06,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162101994] [2021-07-09 18:03:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162101994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693755301] [2021-07-09 18:03:06,988 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 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 [2021-07-09 18:03:07,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:03:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:03:07,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:07,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:07,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:07,174 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 25 treesize of output 31 [2021-07-09 18:03:07,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:07,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:07,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:07,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:30 [2021-07-09 18:03:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693755301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:07,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:07,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:03:07,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390410734] [2021-07-09 18:03:07,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:03:07,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:03:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:03:07,311 INFO L87 Difference]: Start difference. First operand 10163 states and 46020 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:08,211 INFO L93 Difference]: Finished difference Result 10807 states and 48450 transitions. [2021-07-09 18:03:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:03:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:08,245 INFO L225 Difference]: With dead ends: 10807 [2021-07-09 18:03:08,245 INFO L226 Difference]: Without dead ends: 10784 [2021-07-09 18:03:08,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 686.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:03:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10784 states. [2021-07-09 18:03:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10784 to 10114. [2021-07-09 18:03:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 4.528824285573025) internal successors, (45800), 10113 states have internal predecessors, (45800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 45800 transitions. [2021-07-09 18:03:08,516 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 45800 transitions. Word has length 33 [2021-07-09 18:03:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:08,517 INFO L482 AbstractCegarLoop]: Abstraction has 10114 states and 45800 transitions. [2021-07-09 18:03:08,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 45800 transitions. [2021-07-09 18:03:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:08,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:08,538 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, 1, 1, 1] [2021-07-09 18:03:08,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:08,738 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:08,739 INFO L82 PathProgramCache]: Analyzing trace with hash 890651132, now seen corresponding path program 40 times [2021-07-09 18:03:08,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:08,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28087538] [2021-07-09 18:03:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:08,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:08,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28087538] [2021-07-09 18:03:08,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28087538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:08,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537244942] [2021-07-09 18:03:08,906 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 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 [2021-07-09 18:03:08,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:08,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:09,094 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 [2021-07-09 18:03:09,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:09,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:09,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:09,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-07-09 18:03:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:09,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537244942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:09,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:09,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515222489] [2021-07-09 18:03:09,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:09,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:09,178 INFO L87 Difference]: Start difference. First operand 10114 states and 45800 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:10,512 INFO L93 Difference]: Finished difference Result 10855 states and 48853 transitions. [2021-07-09 18:03:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:03:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:10,546 INFO L225 Difference]: With dead ends: 10855 [2021-07-09 18:03:10,546 INFO L226 Difference]: Without dead ends: 10840 [2021-07-09 18:03:10,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 938.9ms TimeCoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:03:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10840 states. [2021-07-09 18:03:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10840 to 10114. [2021-07-09 18:03:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 4.528824285573025) internal successors, (45800), 10113 states have internal predecessors, (45800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 45800 transitions. [2021-07-09 18:03:10,779 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 45800 transitions. Word has length 33 [2021-07-09 18:03:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:10,779 INFO L482 AbstractCegarLoop]: Abstraction has 10114 states and 45800 transitions. [2021-07-09 18:03:10,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 45800 transitions. [2021-07-09 18:03:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:10,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:10,801 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, 1, 1, 1] [2021-07-09 18:03:11,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-07-09 18:03:11,001 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1319723366, now seen corresponding path program 41 times [2021-07-09 18:03:11,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:11,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483576905] [2021-07-09 18:03:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:11,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:11,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483576905] [2021-07-09 18:03:11,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483576905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:11,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587008800] [2021-07-09 18:03:11,163 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 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 [2021-07-09 18:03:11,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:03:11,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:03:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:03:11,350 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 27 treesize of output 13 [2021-07-09 18:03:11,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:11,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:11,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:11,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-07-09 18:03:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:11,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587008800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:11,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:11,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:03:11,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031441803] [2021-07-09 18:03:11,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:11,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:11,444 INFO L87 Difference]: Start difference. First operand 10114 states and 45800 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:12,418 INFO L93 Difference]: Finished difference Result 11031 states and 49411 transitions. [2021-07-09 18:03:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:03:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:12,452 INFO L225 Difference]: With dead ends: 11031 [2021-07-09 18:03:12,453 INFO L226 Difference]: Without dead ends: 11017 [2021-07-09 18:03:12,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:03:12,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11017 states. [2021-07-09 18:03:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11017 to 10090. [2021-07-09 18:03:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10090 states, 10089 states have (on average 4.528991971454059) internal successors, (45693), 10089 states have internal predecessors, (45693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10090 states to 10090 states and 45693 transitions. [2021-07-09 18:03:12,681 INFO L78 Accepts]: Start accepts. Automaton has 10090 states and 45693 transitions. Word has length 33 [2021-07-09 18:03:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:12,681 INFO L482 AbstractCegarLoop]: Abstraction has 10090 states and 45693 transitions. [2021-07-09 18:03:12,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10090 states and 45693 transitions. [2021-07-09 18:03:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:12,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:12,702 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, 1, 1, 1] [2021-07-09 18:03:12,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:12,902 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:12,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1328860398, now seen corresponding path program 42 times [2021-07-09 18:03:12,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:12,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993101465] [2021-07-09 18:03:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:13,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:13,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993101465] [2021-07-09 18:03:13,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993101465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:13,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933907953] [2021-07-09 18:03:13,069 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 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 [2021-07-09 18:03:13,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:03:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:13,376 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:03:13,376 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 29 treesize of output 57 [2021-07-09 18:03:13,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:03:13,400 INFO L628 ElimStorePlain]: treesize reduction 46, result has 30.3 percent of original size [2021-07-09 18:03:13,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:13,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-09 18:03:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:13,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933907953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:13,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:13,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136288086] [2021-07-09 18:03:13,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:13,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:13,501 INFO L87 Difference]: Start difference. First operand 10090 states and 45693 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:14,798 INFO L93 Difference]: Finished difference Result 10575 states and 47523 transitions. [2021-07-09 18:03:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:03:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:14,831 INFO L225 Difference]: With dead ends: 10575 [2021-07-09 18:03:14,831 INFO L226 Difference]: Without dead ends: 10560 [2021-07-09 18:03:14,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:03:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10560 states. [2021-07-09 18:03:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10560 to 10069. [2021-07-09 18:03:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10069 states, 10068 states have (on average 4.527810885975367) internal successors, (45586), 10068 states have internal predecessors, (45586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10069 states to 10069 states and 45586 transitions. [2021-07-09 18:03:15,148 INFO L78 Accepts]: Start accepts. Automaton has 10069 states and 45586 transitions. Word has length 33 [2021-07-09 18:03:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:15,148 INFO L482 AbstractCegarLoop]: Abstraction has 10069 states and 45586 transitions. [2021-07-09 18:03:15,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10069 states and 45586 transitions. [2021-07-09 18:03:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:15,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:15,170 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, 1, 1, 1] [2021-07-09 18:03:15,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:15,370 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1656499226, now seen corresponding path program 43 times [2021-07-09 18:03:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:15,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695972658] [2021-07-09 18:03:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:15,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:15,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695972658] [2021-07-09 18:03:15,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695972658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:15,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489587361] [2021-07-09 18:03:15,538 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 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 [2021-07-09 18:03:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:15,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-07-09 18:03:15,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:15,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:15,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:15,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-09 18:03:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:15,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489587361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:15,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:15,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698969175] [2021-07-09 18:03:15,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:15,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:15,840 INFO L87 Difference]: Start difference. First operand 10069 states and 45586 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:17,013 INFO L93 Difference]: Finished difference Result 10598 states and 47787 transitions. [2021-07-09 18:03:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:03:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:17,045 INFO L225 Difference]: With dead ends: 10598 [2021-07-09 18:03:17,046 INFO L226 Difference]: Without dead ends: 10583 [2021-07-09 18:03:17,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 841.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:03:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10583 states. [2021-07-09 18:03:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10583 to 10069. [2021-07-09 18:03:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10069 states, 10068 states have (on average 4.527810885975367) internal successors, (45586), 10068 states have internal predecessors, (45586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10069 states to 10069 states and 45586 transitions. [2021-07-09 18:03:17,270 INFO L78 Accepts]: Start accepts. Automaton has 10069 states and 45586 transitions. Word has length 33 [2021-07-09 18:03:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:17,270 INFO L482 AbstractCegarLoop]: Abstraction has 10069 states and 45586 transitions. [2021-07-09 18:03:17,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10069 states and 45586 transitions. [2021-07-09 18:03:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:17,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:17,290 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, 1, 1, 1] [2021-07-09 18:03:17,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:17,491 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1591865720, now seen corresponding path program 44 times [2021-07-09 18:03:17,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:17,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048829296] [2021-07-09 18:03:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:17,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:17,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048829296] [2021-07-09 18:03:17,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048829296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:17,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989018262] [2021-07-09 18:03:17,670 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 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 [2021-07-09 18:03:17,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:17,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:17,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:03:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:17,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:17,948 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 [2021-07-09 18:03:17,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:17,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:17,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:17,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:39 [2021-07-09 18:03:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989018262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:18,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:18,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:03:18,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462338024] [2021-07-09 18:03:18,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:18,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:18,080 INFO L87 Difference]: Start difference. First operand 10069 states and 45586 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:19,005 INFO L93 Difference]: Finished difference Result 10401 states and 46829 transitions. [2021-07-09 18:03:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:03:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:19,038 INFO L225 Difference]: With dead ends: 10401 [2021-07-09 18:03:19,038 INFO L226 Difference]: Without dead ends: 10386 [2021-07-09 18:03:19,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:03:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10386 states. [2021-07-09 18:03:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10386 to 10051. [2021-07-09 18:03:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 10050 states have (on average 4.5289552238805975) internal successors, (45516), 10050 states have internal predecessors, (45516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 45516 transitions. [2021-07-09 18:03:19,247 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 45516 transitions. Word has length 33 [2021-07-09 18:03:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:19,247 INFO L482 AbstractCegarLoop]: Abstraction has 10051 states and 45516 transitions. [2021-07-09 18:03:19,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 45516 transitions. [2021-07-09 18:03:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:19,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:19,267 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, 1, 1, 1] [2021-07-09 18:03:19,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 18:03:19,467 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash -26504246, now seen corresponding path program 45 times [2021-07-09 18:03:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:19,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720560492] [2021-07-09 18:03:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:19,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:19,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720560492] [2021-07-09 18:03:19,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720560492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:19,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847170472] [2021-07-09 18:03:19,633 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 [2021-07-09 18:03:19,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:03:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:19,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:19,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:03:19,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:19,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:19,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:19,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-07-09 18:03:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:19,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847170472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:19,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:19,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:03:19,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899727874] [2021-07-09 18:03:19,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:03:19,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:19,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:03:19,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:03:19,961 INFO L87 Difference]: Start difference. First operand 10051 states and 45516 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:21,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:21,541 INFO L93 Difference]: Finished difference Result 11309 states and 50648 transitions. [2021-07-09 18:03:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:03:21,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:21,578 INFO L225 Difference]: With dead ends: 11309 [2021-07-09 18:03:21,578 INFO L226 Difference]: Without dead ends: 11290 [2021-07-09 18:03:21,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1193.3ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:03:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11290 states. [2021-07-09 18:03:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11290 to 10163. [2021-07-09 18:03:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10163 states, 10162 states have (on average 4.530899429246212) internal successors, (46043), 10162 states have internal predecessors, (46043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10163 states to 10163 states and 46043 transitions. [2021-07-09 18:03:21,814 INFO L78 Accepts]: Start accepts. Automaton has 10163 states and 46043 transitions. Word has length 33 [2021-07-09 18:03:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:21,814 INFO L482 AbstractCegarLoop]: Abstraction has 10163 states and 46043 transitions. [2021-07-09 18:03:21,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10163 states and 46043 transitions. [2021-07-09 18:03:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:21,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:21,913 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, 1, 1, 1] [2021-07-09 18:03:22,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-07-09 18:03:22,114 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1276768360, now seen corresponding path program 46 times [2021-07-09 18:03:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:22,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11587312] [2021-07-09 18:03:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:22,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:22,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11587312] [2021-07-09 18:03:22,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11587312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:22,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142795853] [2021-07-09 18:03:22,274 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 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 [2021-07-09 18:03:22,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:22,453 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 29 treesize of output 13 [2021-07-09 18:03:22,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:22,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:22,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:22,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-07-09 18:03:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:22,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142795853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:22,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:22,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:22,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782599490] [2021-07-09 18:03:22,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:22,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:22,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:22,531 INFO L87 Difference]: Start difference. First operand 10163 states and 46043 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:23,626 INFO L93 Difference]: Finished difference Result 11608 states and 51632 transitions. [2021-07-09 18:03:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:03:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:23,662 INFO L225 Difference]: With dead ends: 11608 [2021-07-09 18:03:23,662 INFO L226 Difference]: Without dead ends: 11584 [2021-07-09 18:03:23,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 756.5ms TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:03:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11584 states. [2021-07-09 18:03:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11584 to 10199. [2021-07-09 18:03:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10198 states have (on average 4.5318689939203765) internal successors, (46216), 10198 states have internal predecessors, (46216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 46216 transitions. [2021-07-09 18:03:23,914 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 46216 transitions. Word has length 33 [2021-07-09 18:03:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:23,914 INFO L482 AbstractCegarLoop]: Abstraction has 10199 states and 46216 transitions. [2021-07-09 18:03:23,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 46216 transitions. [2021-07-09 18:03:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:23,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:23,934 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, 1, 1, 1] [2021-07-09 18:03:24,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:24,135 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash -391625082, now seen corresponding path program 47 times [2021-07-09 18:03:24,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:24,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336626705] [2021-07-09 18:03:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:24,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336626705] [2021-07-09 18:03:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336626705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940268646] [2021-07-09 18:03:24,305 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 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 [2021-07-09 18:03:24,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:03:24,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:24,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:24,491 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 29 treesize of output 13 [2021-07-09 18:03:24,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:24,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:24,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:24,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:10 [2021-07-09 18:03:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:24,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940268646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:24,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:24,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:03:24,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412953952] [2021-07-09 18:03:24,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:03:24,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:24,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:03:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:03:24,564 INFO L87 Difference]: Start difference. First operand 10199 states and 46216 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:25,732 INFO L93 Difference]: Finished difference Result 11568 states and 51550 transitions. [2021-07-09 18:03:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:03:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:25,770 INFO L225 Difference]: With dead ends: 11568 [2021-07-09 18:03:25,771 INFO L226 Difference]: Without dead ends: 11528 [2021-07-09 18:03:25,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 770.3ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:03:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11528 states. [2021-07-09 18:03:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11528 to 10220. [2021-07-09 18:03:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10220 states, 10219 states have (on average 4.531754574811625) internal successors, (46310), 10219 states have internal predecessors, (46310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10220 states to 10220 states and 46310 transitions. [2021-07-09 18:03:26,032 INFO L78 Accepts]: Start accepts. Automaton has 10220 states and 46310 transitions. Word has length 33 [2021-07-09 18:03:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:26,032 INFO L482 AbstractCegarLoop]: Abstraction has 10220 states and 46310 transitions. [2021-07-09 18:03:26,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10220 states and 46310 transitions. [2021-07-09 18:03:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:26,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:26,053 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, 1, 1, 1] [2021-07-09 18:03:26,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-09 18:03:26,254 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:26,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1008756360, now seen corresponding path program 48 times [2021-07-09 18:03:26,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:26,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991967078] [2021-07-09 18:03:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:26,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:26,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991967078] [2021-07-09 18:03:26,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991967078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:26,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818058460] [2021-07-09 18:03:26,420 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 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 [2021-07-09 18:03:26,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:03:26,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:26,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:03:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:26,663 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:03:26,664 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 31 treesize of output 59 [2021-07-09 18:03:26,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:26,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:26,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:26,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:54 [2021-07-09 18:03:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:26,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818058460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:26,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:26,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:26,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057485323] [2021-07-09 18:03:26,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:26,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:26,863 INFO L87 Difference]: Start difference. First operand 10220 states and 46310 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:28,348 INFO L93 Difference]: Finished difference Result 10863 states and 48785 transitions. [2021-07-09 18:03:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:03:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:28,382 INFO L225 Difference]: With dead ends: 10863 [2021-07-09 18:03:28,383 INFO L226 Difference]: Without dead ends: 10833 [2021-07-09 18:03:28,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1155.2ms TimeCoverageRelationStatistics Valid=223, Invalid=2227, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:03:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10833 states. [2021-07-09 18:03:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10833 to 10199. [2021-07-09 18:03:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10198 states have (on average 4.5315748185918805) internal successors, (46213), 10198 states have internal predecessors, (46213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 46213 transitions. [2021-07-09 18:03:28,720 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 46213 transitions. Word has length 33 [2021-07-09 18:03:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:28,720 INFO L482 AbstractCegarLoop]: Abstraction has 10199 states and 46213 transitions. [2021-07-09 18:03:28,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 46213 transitions. [2021-07-09 18:03:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:28,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:28,742 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, 1, 1, 1] [2021-07-09 18:03:28,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-07-09 18:03:28,942 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:28,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1066699406, now seen corresponding path program 49 times [2021-07-09 18:03:28,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:28,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571380569] [2021-07-09 18:03:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:29,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571380569] [2021-07-09 18:03:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571380569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040762246] [2021-07-09 18:03:29,110 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 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 [2021-07-09 18:03:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:29,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:29,340 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 28 treesize of output 12 [2021-07-09 18:03:29,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:29,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:29,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:29,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-09 18:03:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:29,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040762246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:29,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:29,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127963875] [2021-07-09 18:03:29,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:29,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:29,408 INFO L87 Difference]: Start difference. First operand 10199 states and 46213 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:30,907 INFO L93 Difference]: Finished difference Result 11007 states and 49496 transitions. [2021-07-09 18:03:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:03:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:30,943 INFO L225 Difference]: With dead ends: 11007 [2021-07-09 18:03:30,943 INFO L226 Difference]: Without dead ends: 10977 [2021-07-09 18:03:30,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 999.2ms TimeCoverageRelationStatistics Valid=223, Invalid=1939, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:03:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2021-07-09 18:03:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10202. [2021-07-09 18:03:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 4.531320458778551) internal successors, (46224), 10201 states have internal predecessors, (46224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 46224 transitions. [2021-07-09 18:03:31,176 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 46224 transitions. Word has length 33 [2021-07-09 18:03:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:31,176 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 46224 transitions. [2021-07-09 18:03:31,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 46224 transitions. [2021-07-09 18:03:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:31,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:31,197 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, 1, 1, 1] [2021-07-09 18:03:31,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:31,398 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1500728752, now seen corresponding path program 50 times [2021-07-09 18:03:31,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:31,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396325638] [2021-07-09 18:03:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:31,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:31,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396325638] [2021-07-09 18:03:31,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396325638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:31,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028325935] [2021-07-09 18:03:31,565 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 [2021-07-09 18:03:31,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:31,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:03:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:31,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:31,802 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 25 treesize of output 31 [2021-07-09 18:03:31,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:31,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:31,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:31,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:52 [2021-07-09 18:03:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:31,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028325935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:31,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:31,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:03:31,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818959971] [2021-07-09 18:03:31,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:31,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:31,977 INFO L87 Difference]: Start difference. First operand 10202 states and 46224 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:33,286 INFO L93 Difference]: Finished difference Result 10942 states and 49103 transitions. [2021-07-09 18:03:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:03:33,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:33,322 INFO L225 Difference]: With dead ends: 10942 [2021-07-09 18:03:33,322 INFO L226 Difference]: Without dead ends: 10912 [2021-07-09 18:03:33,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:03:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10912 states. [2021-07-09 18:03:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10912 to 10175. [2021-07-09 18:03:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10175 states, 10174 states have (on average 4.530764694318852) internal successors, (46096), 10174 states have internal predecessors, (46096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10175 states to 10175 states and 46096 transitions. [2021-07-09 18:03:33,564 INFO L78 Accepts]: Start accepts. Automaton has 10175 states and 46096 transitions. Word has length 33 [2021-07-09 18:03:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:33,564 INFO L482 AbstractCegarLoop]: Abstraction has 10175 states and 46096 transitions. [2021-07-09 18:03:33,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 10175 states and 46096 transitions. [2021-07-09 18:03:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:33,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:33,586 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, 1, 1, 1] [2021-07-09 18:03:33,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:33,787 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1922783374, now seen corresponding path program 51 times [2021-07-09 18:03:33,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:33,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823501394] [2021-07-09 18:03:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:33,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:33,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823501394] [2021-07-09 18:03:33,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823501394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:33,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725704777] [2021-07-09 18:03:33,957 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 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 [2021-07-09 18:03:33,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:03:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:33,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:34,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:34,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:03:34,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:34,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:34,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:34,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:03:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:34,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725704777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:34,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:34,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:03:34,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801412470] [2021-07-09 18:03:34,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:03:34,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:34,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:03:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:03:34,293 INFO L87 Difference]: Start difference. First operand 10175 states and 46096 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:35,925 INFO L93 Difference]: Finished difference Result 11205 states and 50278 transitions. [2021-07-09 18:03:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:03:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:36,019 INFO L225 Difference]: With dead ends: 11205 [2021-07-09 18:03:36,020 INFO L226 Difference]: Without dead ends: 11186 [2021-07-09 18:03:36,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1369.8ms TimeCoverageRelationStatistics Valid=378, Invalid=1878, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:03:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-07-09 18:03:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 10254. [2021-07-09 18:03:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10254 states, 10253 states have (on average 4.531161611235736) internal successors, (46458), 10253 states have internal predecessors, (46458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10254 states to 10254 states and 46458 transitions. [2021-07-09 18:03:36,238 INFO L78 Accepts]: Start accepts. Automaton has 10254 states and 46458 transitions. Word has length 33 [2021-07-09 18:03:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:36,238 INFO L482 AbstractCegarLoop]: Abstraction has 10254 states and 46458 transitions. [2021-07-09 18:03:36,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 10254 states and 46458 transitions. [2021-07-09 18:03:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:36,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:36,260 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, 1, 1, 1] [2021-07-09 18:03:36,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:36,460 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1068911316, now seen corresponding path program 52 times [2021-07-09 18:03:36,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:36,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627655468] [2021-07-09 18:03:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:36,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:36,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627655468] [2021-07-09 18:03:36,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627655468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:36,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488934426] [2021-07-09 18:03:36,628 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 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 [2021-07-09 18:03:36,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:36,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:36,780 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 [2021-07-09 18:03:36,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:36,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:36,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:36,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:03:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488934426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:36,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:36,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:36,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165740756] [2021-07-09 18:03:36,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:36,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:36,874 INFO L87 Difference]: Start difference. First operand 10254 states and 46458 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:37,942 INFO L93 Difference]: Finished difference Result 11409 states and 50861 transitions. [2021-07-09 18:03:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:03:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:37,978 INFO L225 Difference]: With dead ends: 11409 [2021-07-09 18:03:37,978 INFO L226 Difference]: Without dead ends: 11385 [2021-07-09 18:03:37,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:03:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11385 states. [2021-07-09 18:03:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11385 to 10257. [2021-07-09 18:03:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 4.530811232449298) internal successors, (46468), 10256 states have internal predecessors, (46468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 46468 transitions. [2021-07-09 18:03:38,227 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 46468 transitions. Word has length 33 [2021-07-09 18:03:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:38,227 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 46468 transitions. [2021-07-09 18:03:38,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 46468 transitions. [2021-07-09 18:03:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:38,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:38,249 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, 1, 1, 1] [2021-07-09 18:03:38,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-09 18:03:38,449 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1557662538, now seen corresponding path program 53 times [2021-07-09 18:03:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:38,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713206653] [2021-07-09 18:03:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:38,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713206653] [2021-07-09 18:03:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713206653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783417806] [2021-07-09 18:03:38,618 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 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 [2021-07-09 18:03:38,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:03:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:38,777 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 29 treesize of output 13 [2021-07-09 18:03:38,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:38,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:38,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:38,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:03:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:38,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783417806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:38,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:38,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:03:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079489377] [2021-07-09 18:03:38,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:03:38,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:03:38,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:03:38,867 INFO L87 Difference]: Start difference. First operand 10257 states and 46468 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:40,144 INFO L93 Difference]: Finished difference Result 11369 states and 50779 transitions. [2021-07-09 18:03:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:03:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:40,182 INFO L225 Difference]: With dead ends: 11369 [2021-07-09 18:03:40,182 INFO L226 Difference]: Without dead ends: 11329 [2021-07-09 18:03:40,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 863.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:03:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11329 states. [2021-07-09 18:03:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11329 to 10238. [2021-07-09 18:03:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10238 states, 10237 states have (on average 4.531014945784898) internal successors, (46384), 10237 states have internal predecessors, (46384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10238 states to 10238 states and 46384 transitions. [2021-07-09 18:03:40,429 INFO L78 Accepts]: Start accepts. Automaton has 10238 states and 46384 transitions. Word has length 33 [2021-07-09 18:03:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:40,429 INFO L482 AbstractCegarLoop]: Abstraction has 10238 states and 46384 transitions. [2021-07-09 18:03:40,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 10238 states and 46384 transitions. [2021-07-09 18:03:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:40,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:40,450 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, 1, 1, 1] [2021-07-09 18:03:40,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 18:03:40,651 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash 940531260, now seen corresponding path program 54 times [2021-07-09 18:03:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:40,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545577238] [2021-07-09 18:03:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:40,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:40,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545577238] [2021-07-09 18:03:40,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545577238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:40,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826996616] [2021-07-09 18:03:40,827 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 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 [2021-07-09 18:03:40,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:03:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:40,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:41,034 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:03:41,035 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 29 treesize of output 57 [2021-07-09 18:03:41,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:41,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:41,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:41,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 18:03:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826996616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:41,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:41,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:41,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035816689] [2021-07-09 18:03:41,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:41,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:41,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:41,296 INFO L87 Difference]: Start difference. First operand 10238 states and 46384 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:42,754 INFO L93 Difference]: Finished difference Result 10690 states and 48156 transitions. [2021-07-09 18:03:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:03:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:42,848 INFO L225 Difference]: With dead ends: 10690 [2021-07-09 18:03:42,848 INFO L226 Difference]: Without dead ends: 10660 [2021-07-09 18:03:42,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1223.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:03:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10660 states. [2021-07-09 18:03:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10660 to 10193. [2021-07-09 18:03:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10193 states, 10192 states have (on average 4.5310047095761385) internal successors, (46180), 10192 states have internal predecessors, (46180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10193 states to 10193 states and 46180 transitions. [2021-07-09 18:03:43,058 INFO L78 Accepts]: Start accepts. Automaton has 10193 states and 46180 transitions. Word has length 33 [2021-07-09 18:03:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:43,058 INFO L482 AbstractCegarLoop]: Abstraction has 10193 states and 46180 transitions. [2021-07-09 18:03:43,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10193 states and 46180 transitions. [2021-07-09 18:03:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:43,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:43,079 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, 1, 1, 1] [2021-07-09 18:03:43,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-07-09 18:03:43,280 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash -108241142, now seen corresponding path program 55 times [2021-07-09 18:03:43,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:43,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383324752] [2021-07-09 18:03:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:43,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:43,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383324752] [2021-07-09 18:03:43,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383324752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:43,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521930272] [2021-07-09 18:03:43,454 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 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 [2021-07-09 18:03:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:43,609 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 [2021-07-09 18:03:43,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:43,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:43,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:43,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:03:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:43,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521930272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:43,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:43,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:03:43,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591750974] [2021-07-09 18:03:43,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:03:43,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:03:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:03:43,703 INFO L87 Difference]: Start difference. First operand 10193 states and 46180 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:45,286 INFO L93 Difference]: Finished difference Result 11816 states and 52505 transitions. [2021-07-09 18:03:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:03:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:45,326 INFO L225 Difference]: With dead ends: 11816 [2021-07-09 18:03:45,326 INFO L226 Difference]: Without dead ends: 11778 [2021-07-09 18:03:45,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=410, Invalid=2242, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:03:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11778 states. [2021-07-09 18:03:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11778 to 10333. [2021-07-09 18:03:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10332 states have (on average 4.532133178474642) internal successors, (46826), 10332 states have internal predecessors, (46826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 46826 transitions. [2021-07-09 18:03:45,590 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 46826 transitions. Word has length 33 [2021-07-09 18:03:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:45,590 INFO L482 AbstractCegarLoop]: Abstraction has 10333 states and 46826 transitions. [2021-07-09 18:03:45,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 46826 transitions. [2021-07-09 18:03:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:45,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:45,612 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, 1, 1, 1] [2021-07-09 18:03:45,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:45,813 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1195031464, now seen corresponding path program 56 times [2021-07-09 18:03:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84030000] [2021-07-09 18:03:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:45,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84030000] [2021-07-09 18:03:45,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84030000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:45,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033537086] [2021-07-09 18:03:45,979 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 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 [2021-07-09 18:03:46,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:46,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:03:46,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:46,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:46,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:46,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:03:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:46,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033537086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:46,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:46,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:03:46,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332936168] [2021-07-09 18:03:46,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:46,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:46,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:46,393 INFO L87 Difference]: Start difference. First operand 10333 states and 46826 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:47,697 INFO L93 Difference]: Finished difference Result 11048 states and 49463 transitions. [2021-07-09 18:03:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:03:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:47,730 INFO L225 Difference]: With dead ends: 11048 [2021-07-09 18:03:47,730 INFO L226 Difference]: Without dead ends: 11035 [2021-07-09 18:03:47,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:03:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2021-07-09 18:03:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 10284. [2021-07-09 18:03:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10283 states have (on average 4.531751434406302) internal successors, (46600), 10283 states have internal predecessors, (46600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 46600 transitions. [2021-07-09 18:03:47,945 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 46600 transitions. Word has length 33 [2021-07-09 18:03:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:47,945 INFO L482 AbstractCegarLoop]: Abstraction has 10284 states and 46600 transitions. [2021-07-09 18:03:47,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:47,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 46600 transitions. [2021-07-09 18:03:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:47,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:47,964 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, 1, 1, 1] [2021-07-09 18:03:48,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:48,164 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash 295669392, now seen corresponding path program 57 times [2021-07-09 18:03:48,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:48,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313999838] [2021-07-09 18:03:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:48,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313999838] [2021-07-09 18:03:48,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313999838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073717134] [2021-07-09 18:03:48,333 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 [2021-07-09 18:03:48,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:03:48,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:48,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:48,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:03:48,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:48,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:48,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:48,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:03:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073717134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:48,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:03:48,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530341498] [2021-07-09 18:03:48,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:48,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:48,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:48,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:48,697 INFO L87 Difference]: Start difference. First operand 10284 states and 46600 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:50,250 INFO L93 Difference]: Finished difference Result 11050 states and 49596 transitions. [2021-07-09 18:03:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:03:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:50,285 INFO L225 Difference]: With dead ends: 11050 [2021-07-09 18:03:50,285 INFO L226 Difference]: Without dead ends: 11035 [2021-07-09 18:03:50,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1335.5ms TimeCoverageRelationStatistics Valid=349, Invalid=1813, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:03:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2021-07-09 18:03:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 10333. [2021-07-09 18:03:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10332 states have (on average 4.531842818428184) internal successors, (46823), 10332 states have internal predecessors, (46823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 46823 transitions. [2021-07-09 18:03:50,493 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 46823 transitions. Word has length 33 [2021-07-09 18:03:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:50,493 INFO L482 AbstractCegarLoop]: Abstraction has 10333 states and 46823 transitions. [2021-07-09 18:03:50,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 46823 transitions. [2021-07-09 18:03:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:50,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:50,513 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, 1, 1, 1] [2021-07-09 18:03:50,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-07-09 18:03:50,714 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1484928910, now seen corresponding path program 58 times [2021-07-09 18:03:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:50,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615687217] [2021-07-09 18:03:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:50,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:50,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615687217] [2021-07-09 18:03:50,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615687217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:50,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809688937] [2021-07-09 18:03:50,887 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 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 [2021-07-09 18:03:50,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:50,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:51,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:51,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:03:51,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:51,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:51,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:51,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:03:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809688937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:51,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:51,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132596635] [2021-07-09 18:03:51,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:51,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:51,146 INFO L87 Difference]: Start difference. First operand 10333 states and 46823 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:52,499 INFO L93 Difference]: Finished difference Result 11467 states and 51112 transitions. [2021-07-09 18:03:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:03:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:52,538 INFO L225 Difference]: With dead ends: 11467 [2021-07-09 18:03:52,538 INFO L226 Difference]: Without dead ends: 11433 [2021-07-09 18:03:52,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:03:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11433 states. [2021-07-09 18:03:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11433 to 10287. [2021-07-09 18:03:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10287 states, 10286 states have (on average 4.531693564067665) internal successors, (46613), 10286 states have internal predecessors, (46613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10287 states to 10287 states and 46613 transitions. [2021-07-09 18:03:52,842 INFO L78 Accepts]: Start accepts. Automaton has 10287 states and 46613 transitions. Word has length 33 [2021-07-09 18:03:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:52,843 INFO L482 AbstractCegarLoop]: Abstraction has 10287 states and 46613 transitions. [2021-07-09 18:03:52,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 10287 states and 46613 transitions. [2021-07-09 18:03:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:52,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:52,864 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, 1, 1, 1] [2021-07-09 18:03:53,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-09 18:03:53,064 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 410991178, now seen corresponding path program 59 times [2021-07-09 18:03:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:53,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969255963] [2021-07-09 18:03:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:53,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:53,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969255963] [2021-07-09 18:03:53,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969255963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:53,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104287796] [2021-07-09 18:03:53,246 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 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 [2021-07-09 18:03:53,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:03:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:03:53,416 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 29 treesize of output 13 [2021-07-09 18:03:53,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:53,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:53,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:53,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:03:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:53,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104287796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:53,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:53,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:03:53,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73001960] [2021-07-09 18:03:53,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:03:53,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:03:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:03:53,515 INFO L87 Difference]: Start difference. First operand 10287 states and 46613 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:55,004 INFO L93 Difference]: Finished difference Result 11050 states and 49648 transitions. [2021-07-09 18:03:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:03:55,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:55,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:55,040 INFO L225 Difference]: With dead ends: 11050 [2021-07-09 18:03:55,040 INFO L226 Difference]: Without dead ends: 11022 [2021-07-09 18:03:55,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1108.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:03:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2021-07-09 18:03:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 10248. [2021-07-09 18:03:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 4.530691909827267) internal successors, (46426), 10247 states have internal predecessors, (46426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 46426 transitions. [2021-07-09 18:03:55,246 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 46426 transitions. Word has length 33 [2021-07-09 18:03:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:55,246 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 46426 transitions. [2021-07-09 18:03:55,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 46426 transitions. [2021-07-09 18:03:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:55,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:55,265 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, 1, 1, 1] [2021-07-09 18:03:55,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:55,466 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:55,466 INFO L82 PathProgramCache]: Analyzing trace with hash -193174718, now seen corresponding path program 24 times [2021-07-09 18:03:55,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:55,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541890635] [2021-07-09 18:03:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:55,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:55,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541890635] [2021-07-09 18:03:55,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541890635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:55,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96590561] [2021-07-09 18:03:55,682 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 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 [2021-07-09 18:03:55,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:03:55,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:55,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:55,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:03:55,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:55,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:55,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:55,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:03:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:56,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96590561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:56,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:56,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:03:56,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114715110] [2021-07-09 18:03:56,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:03:56,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:56,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:03:56,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:03:56,088 INFO L87 Difference]: Start difference. First operand 10248 states and 46426 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:56,283 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-07-09 18:03:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:58,070 INFO L93 Difference]: Finished difference Result 11394 states and 51027 transitions. [2021-07-09 18:03:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:03:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:03:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:58,105 INFO L225 Difference]: With dead ends: 11394 [2021-07-09 18:03:58,105 INFO L226 Difference]: Without dead ends: 11375 [2021-07-09 18:03:58,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1845.4ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:03:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11375 states. [2021-07-09 18:03:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11375 to 10406. [2021-07-09 18:03:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10405 states have (on average 4.531475252282556) internal successors, (47150), 10405 states have internal predecessors, (47150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 47150 transitions. [2021-07-09 18:03:58,334 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 47150 transitions. Word has length 33 [2021-07-09 18:03:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:58,334 INFO L482 AbstractCegarLoop]: Abstraction has 10406 states and 47150 transitions. [2021-07-09 18:03:58,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 47150 transitions. [2021-07-09 18:03:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:03:58,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:58,356 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, 1, 1, 1] [2021-07-09 18:03:58,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-07-09 18:03:58,556 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1229180108, now seen corresponding path program 25 times [2021-07-09 18:03:58,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:58,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745872074] [2021-07-09 18:03:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:58,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745872074] [2021-07-09 18:03:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745872074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903327329] [2021-07-09 18:03:58,765 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 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 [2021-07-09 18:03:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:58,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:58,943 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 [2021-07-09 18:03:58,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:03:58,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:03:58,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:03:58,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:03:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:59,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903327329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:59,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:59,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:03:59,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548806774] [2021-07-09 18:03:59,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:59,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:59,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:59,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:59,028 INFO L87 Difference]: Start difference. First operand 10406 states and 47150 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:00,332 INFO L93 Difference]: Finished difference Result 11556 states and 51607 transitions. [2021-07-09 18:04:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:04:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:00,367 INFO L225 Difference]: With dead ends: 11556 [2021-07-09 18:04:00,367 INFO L226 Difference]: Without dead ends: 11541 [2021-07-09 18:04:00,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1072.1ms TimeCoverageRelationStatistics Valid=315, Invalid=1755, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:04:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11541 states. [2021-07-09 18:04:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11541 to 10366. [2021-07-09 18:04:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 4.530438977327544) internal successors, (46958), 10365 states have internal predecessors, (46958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 46958 transitions. [2021-07-09 18:04:00,606 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 46958 transitions. Word has length 33 [2021-07-09 18:04:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:00,607 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 46958 transitions. [2021-07-09 18:04:00,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 46958 transitions. [2021-07-09 18:04:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:00,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:00,627 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, 1, 1, 1] [2021-07-09 18:04:00,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:00,827 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,828 INFO L82 PathProgramCache]: Analyzing trace with hash -439213334, now seen corresponding path program 26 times [2021-07-09 18:04:00,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720849010] [2021-07-09 18:04:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:01,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:01,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720849010] [2021-07-09 18:04:01,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720849010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:01,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993862420] [2021-07-09 18:04:01,045 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 [2021-07-09 18:04:01,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:01,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:04:01,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:01,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:01,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:01,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:04:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993862420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:01,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:01,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:04:01,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60659599] [2021-07-09 18:04:01,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:04:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:04:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:04:01,416 INFO L87 Difference]: Start difference. First operand 10366 states and 46958 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:03,051 INFO L93 Difference]: Finished difference Result 11170 states and 50068 transitions. [2021-07-09 18:04:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:04:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:03,085 INFO L225 Difference]: With dead ends: 11170 [2021-07-09 18:04:03,085 INFO L226 Difference]: Without dead ends: 11156 [2021-07-09 18:04:03,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1482.7ms TimeCoverageRelationStatistics Valid=372, Invalid=1698, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:04:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-07-09 18:04:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 10413. [2021-07-09 18:04:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10413 states, 10412 states have (on average 4.530541682673838) internal successors, (47172), 10412 states have internal predecessors, (47172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10413 states to 10413 states and 47172 transitions. [2021-07-09 18:04:03,358 INFO L78 Accepts]: Start accepts. Automaton has 10413 states and 47172 transitions. Word has length 33 [2021-07-09 18:04:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:03,358 INFO L482 AbstractCegarLoop]: Abstraction has 10413 states and 47172 transitions. [2021-07-09 18:04:03,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10413 states and 47172 transitions. [2021-07-09 18:04:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:03,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:03,378 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, 1, 1, 1] [2021-07-09 18:04:03,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-07-09 18:04:03,579 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:03,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1630053640, now seen corresponding path program 27 times [2021-07-09 18:04:03,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:03,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365979146] [2021-07-09 18:04:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:03,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:03,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365979146] [2021-07-09 18:04:03,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365979146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:03,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279318999] [2021-07-09 18:04:03,787 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 [2021-07-09 18:04:03,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:04:03,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:03,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:03,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-07-09 18:04:03,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:03,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:03,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:03,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-07-09 18:04:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:04,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279318999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:04,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:04,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:04:04,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099711820] [2021-07-09 18:04:04,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:04:04,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:04:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:04:04,166 INFO L87 Difference]: Start difference. First operand 10413 states and 47172 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:05,742 INFO L93 Difference]: Finished difference Result 11204 states and 50187 transitions. [2021-07-09 18:04:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:04:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:05,775 INFO L225 Difference]: With dead ends: 11204 [2021-07-09 18:04:05,775 INFO L226 Difference]: Without dead ends: 11181 [2021-07-09 18:04:05,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1391.7ms TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:04:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2021-07-09 18:04:05,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 10358. [2021-07-09 18:04:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 4.531234913585015) internal successors, (46930), 10357 states have internal predecessors, (46930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 46930 transitions. [2021-07-09 18:04:05,995 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 46930 transitions. Word has length 33 [2021-07-09 18:04:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:05,995 INFO L482 AbstractCegarLoop]: Abstraction has 10358 states and 46930 transitions. [2021-07-09 18:04:05,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 46930 transitions. [2021-07-09 18:04:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:06,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:06,015 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, 1, 1, 1] [2021-07-09 18:04:06,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:06,215 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1268058332, now seen corresponding path program 28 times [2021-07-09 18:04:06,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:06,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7103122] [2021-07-09 18:04:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:06,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7103122] [2021-07-09 18:04:06,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7103122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447593659] [2021-07-09 18:04:06,423 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 [2021-07-09 18:04:06,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:06,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:06,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:06,683 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 [2021-07-09 18:04:06,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:06,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:06,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:06,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:04:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:06,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447593659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:06,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:06,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:04:06,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542734106] [2021-07-09 18:04:06,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:04:06,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:06,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:04:06,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:04:06,770 INFO L87 Difference]: Start difference. First operand 10358 states and 46930 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:08,494 INFO L93 Difference]: Finished difference Result 11215 states and 50477 transitions. [2021-07-09 18:04:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:04:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:08,526 INFO L225 Difference]: With dead ends: 11215 [2021-07-09 18:04:08,527 INFO L226 Difference]: Without dead ends: 11200 [2021-07-09 18:04:08,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1319.2ms TimeCoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:04:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11200 states. [2021-07-09 18:04:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11200 to 10358. [2021-07-09 18:04:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 4.531234913585015) internal successors, (46930), 10357 states have internal predecessors, (46930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 46930 transitions. [2021-07-09 18:04:08,736 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 46930 transitions. Word has length 33 [2021-07-09 18:04:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:08,736 INFO L482 AbstractCegarLoop]: Abstraction has 10358 states and 46930 transitions. [2021-07-09 18:04:08,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 46930 transitions. [2021-07-09 18:04:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:08,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:08,755 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, 1, 1, 1] [2021-07-09 18:04:08,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-09 18:04:08,956 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash -942316166, now seen corresponding path program 29 times [2021-07-09 18:04:08,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:08,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929081455] [2021-07-09 18:04:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:09,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929081455] [2021-07-09 18:04:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929081455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024386039] [2021-07-09 18:04:09,158 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 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 [2021-07-09 18:04:09,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:04:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:09,342 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 [2021-07-09 18:04:09,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:09,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:09,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:09,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:04:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:09,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024386039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:09,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:09,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:04:09,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47323497] [2021-07-09 18:04:09,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:04:09,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:09,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:04:09,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:09,420 INFO L87 Difference]: Start difference. First operand 10358 states and 46930 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:10,800 INFO L93 Difference]: Finished difference Result 11449 states and 51205 transitions. [2021-07-09 18:04:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:04:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:10,833 INFO L225 Difference]: With dead ends: 11449 [2021-07-09 18:04:10,833 INFO L226 Difference]: Without dead ends: 11435 [2021-07-09 18:04:10,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:04:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11435 states. [2021-07-09 18:04:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11435 to 10334. [2021-07-09 18:04:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10334 states, 10333 states have (on average 4.531404238846414) internal successors, (46823), 10333 states have internal predecessors, (46823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10334 states to 10334 states and 46823 transitions. [2021-07-09 18:04:11,064 INFO L78 Accepts]: Start accepts. Automaton has 10334 states and 46823 transitions. Word has length 33 [2021-07-09 18:04:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:11,064 INFO L482 AbstractCegarLoop]: Abstraction has 10334 states and 46823 transitions. [2021-07-09 18:04:11,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10334 states and 46823 transitions. [2021-07-09 18:04:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:11,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:11,084 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, 1, 1, 1] [2021-07-09 18:04:11,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-09 18:04:11,285 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1631225734, now seen corresponding path program 30 times [2021-07-09 18:04:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:11,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58098834] [2021-07-09 18:04:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:11,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:11,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58098834] [2021-07-09 18:04:11,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58098834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:11,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739105301] [2021-07-09 18:04:11,482 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 [2021-07-09 18:04:11,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:11,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:11,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:11,790 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:04:11,790 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 29 treesize of output 57 [2021-07-09 18:04:11,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:04:11,810 INFO L628 ElimStorePlain]: treesize reduction 46, result has 30.3 percent of original size [2021-07-09 18:04:11,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:11,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-09 18:04:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:11,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739105301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:11,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:11,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:04:11,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042213287] [2021-07-09 18:04:11,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:04:11,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:04:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:04:11,909 INFO L87 Difference]: Start difference. First operand 10334 states and 46823 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:13,364 INFO L93 Difference]: Finished difference Result 10892 states and 49009 transitions. [2021-07-09 18:04:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:04:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:13,398 INFO L225 Difference]: With dead ends: 10892 [2021-07-09 18:04:13,398 INFO L226 Difference]: Without dead ends: 10877 [2021-07-09 18:04:13,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1094.2ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:04:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2021-07-09 18:04:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 10313. [2021-07-09 18:04:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 4.530256012412723) internal successors, (46716), 10312 states have internal predecessors, (46716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 46716 transitions. [2021-07-09 18:04:13,662 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 46716 transitions. Word has length 33 [2021-07-09 18:04:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:13,662 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 46716 transitions. [2021-07-09 18:04:13,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 46716 transitions. [2021-07-09 18:04:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:13,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:13,683 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, 1, 1, 1] [2021-07-09 18:04:13,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-09 18:04:13,884 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash 978067898, now seen corresponding path program 31 times [2021-07-09 18:04:13,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:13,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267100538] [2021-07-09 18:04:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:14,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267100538] [2021-07-09 18:04:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267100538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258959867] [2021-07-09 18:04:14,082 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 [2021-07-09 18:04:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:14,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:14,313 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 28 treesize of output 12 [2021-07-09 18:04:14,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:14,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:14,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:14,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-09 18:04:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:14,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258959867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:14,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:14,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:04:14,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20226564] [2021-07-09 18:04:14,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:04:14,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:04:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:04:14,377 INFO L87 Difference]: Start difference. First operand 10313 states and 46716 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:15,689 INFO L93 Difference]: Finished difference Result 10854 states and 48968 transitions. [2021-07-09 18:04:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:04:15,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:15,721 INFO L225 Difference]: With dead ends: 10854 [2021-07-09 18:04:15,721 INFO L226 Difference]: Without dead ends: 10839 [2021-07-09 18:04:15,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:04:15,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2021-07-09 18:04:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 10313. [2021-07-09 18:04:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 4.530256012412723) internal successors, (46716), 10312 states have internal predecessors, (46716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 46716 transitions. [2021-07-09 18:04:15,923 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 46716 transitions. Word has length 33 [2021-07-09 18:04:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:15,923 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 46716 transitions. [2021-07-09 18:04:15,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 46716 transitions. [2021-07-09 18:04:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:15,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:15,942 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, 1, 1, 1] [2021-07-09 18:04:16,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:16,143 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 913434392, now seen corresponding path program 32 times [2021-07-09 18:04:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:16,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623413558] [2021-07-09 18:04:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:16,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623413558] [2021-07-09 18:04:16,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623413558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869510831] [2021-07-09 18:04:16,337 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 [2021-07-09 18:04:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:04:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:16,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:16,632 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 24 treesize of output 30 [2021-07-09 18:04:16,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:16,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:16,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:16,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:51 [2021-07-09 18:04:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869510831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:16,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:16,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:04:16,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192034574] [2021-07-09 18:04:16,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:04:16,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:16,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:04:16,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:16,767 INFO L87 Difference]: Start difference. First operand 10313 states and 46716 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:17,672 INFO L93 Difference]: Finished difference Result 10625 states and 47876 transitions. [2021-07-09 18:04:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:04:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:17,702 INFO L225 Difference]: With dead ends: 10625 [2021-07-09 18:04:17,702 INFO L226 Difference]: Without dead ends: 10610 [2021-07-09 18:04:17,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 805.9ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2021-07-09 18:04:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 10286. [2021-07-09 18:04:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 10285 states have (on average 4.530384054448225) internal successors, (46595), 10285 states have internal predecessors, (46595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 46595 transitions. [2021-07-09 18:04:17,912 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 46595 transitions. Word has length 33 [2021-07-09 18:04:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:17,912 INFO L482 AbstractCegarLoop]: Abstraction has 10286 states and 46595 transitions. [2021-07-09 18:04:17,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 46595 transitions. [2021-07-09 18:04:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:17,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:17,933 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, 1, 1, 1] [2021-07-09 18:04:18,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-09 18:04:18,133 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1290172674, now seen corresponding path program 33 times [2021-07-09 18:04:18,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:18,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718875977] [2021-07-09 18:04:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:18,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:18,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718875977] [2021-07-09 18:04:18,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718875977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:18,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335141107] [2021-07-09 18:04:18,354 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 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 [2021-07-09 18:04:18,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:04:18,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:04:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:18,583 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:04:18,584 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 27 treesize of output 55 [2021-07-09 18:04:18,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:04:18,624 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-07-09 18:04:18,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:18,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 18:04:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:18,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335141107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:18,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:18,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:04:18,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268727262] [2021-07-09 18:04:18,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:04:18,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:18,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:04:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:18,760 INFO L87 Difference]: Start difference. First operand 10286 states and 46595 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:20,672 INFO L93 Difference]: Finished difference Result 11512 states and 51639 transitions. [2021-07-09 18:04:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:04:20,673 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:20,706 INFO L225 Difference]: With dead ends: 11512 [2021-07-09 18:04:20,706 INFO L226 Difference]: Without dead ends: 11493 [2021-07-09 18:04:20,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1557.9ms TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:04:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11493 states. [2021-07-09 18:04:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11493 to 10414. [2021-07-09 18:04:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10413 states have (on average 4.531451070776914) internal successors, (47186), 10413 states have internal predecessors, (47186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 47186 transitions. [2021-07-09 18:04:20,916 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 47186 transitions. Word has length 33 [2021-07-09 18:04:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:20,916 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 47186 transitions. [2021-07-09 18:04:20,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 47186 transitions. [2021-07-09 18:04:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:20,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:20,936 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, 1, 1, 1] [2021-07-09 18:04:21,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:21,137 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:21,137 INFO L82 PathProgramCache]: Analyzing trace with hash 132182152, now seen corresponding path program 34 times [2021-07-09 18:04:21,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:21,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457732407] [2021-07-09 18:04:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:21,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:21,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457732407] [2021-07-09 18:04:21,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457732407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:21,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941021128] [2021-07-09 18:04:21,349 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 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 [2021-07-09 18:04:21,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:21,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:21,528 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 28 treesize of output 12 [2021-07-09 18:04:21,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:21,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:21,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:21,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:04:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:21,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941021128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:21,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:21,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:04:21,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675446121] [2021-07-09 18:04:21,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:04:21,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:21,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:04:21,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:04:21,609 INFO L87 Difference]: Start difference. First operand 10414 states and 47186 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:22,882 INFO L93 Difference]: Finished difference Result 12475 states and 55280 transitions. [2021-07-09 18:04:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:04:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:22,919 INFO L225 Difference]: With dead ends: 12475 [2021-07-09 18:04:22,919 INFO L226 Difference]: Without dead ends: 12451 [2021-07-09 18:04:22,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1065.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:04:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12451 states. [2021-07-09 18:04:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12451 to 10495. [2021-07-09 18:04:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10495 states, 10494 states have (on average 4.536115875738517) internal successors, (47602), 10494 states have internal predecessors, (47602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10495 states to 10495 states and 47602 transitions. [2021-07-09 18:04:23,166 INFO L78 Accepts]: Start accepts. Automaton has 10495 states and 47602 transitions. Word has length 33 [2021-07-09 18:04:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:23,166 INFO L482 AbstractCegarLoop]: Abstraction has 10495 states and 47602 transitions. [2021-07-09 18:04:23,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10495 states and 47602 transitions. [2021-07-09 18:04:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:23,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:23,187 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, 1, 1, 1] [2021-07-09 18:04:23,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-09 18:04:23,387 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1536211290, now seen corresponding path program 35 times [2021-07-09 18:04:23,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:23,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023992278] [2021-07-09 18:04:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:23,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023992278] [2021-07-09 18:04:23,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023992278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200430454] [2021-07-09 18:04:23,685 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 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 [2021-07-09 18:04:23,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:04:23,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:23,864 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 [2021-07-09 18:04:23,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:23,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:23,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:23,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:04:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:23,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200430454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:23,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:23,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:04:23,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846551638] [2021-07-09 18:04:23,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:04:23,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:23,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:04:23,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:23,940 INFO L87 Difference]: Start difference. First operand 10495 states and 47602 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:25,283 INFO L93 Difference]: Finished difference Result 12447 states and 55213 transitions. [2021-07-09 18:04:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:04:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:25,324 INFO L225 Difference]: With dead ends: 12447 [2021-07-09 18:04:25,324 INFO L226 Difference]: Without dead ends: 12410 [2021-07-09 18:04:25,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1171.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:04:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12410 states. [2021-07-09 18:04:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12410 to 10535. [2021-07-09 18:04:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10535 states, 10534 states have (on average 4.536928042528954) internal successors, (47792), 10534 states have internal predecessors, (47792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 47792 transitions. [2021-07-09 18:04:25,562 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 47792 transitions. Word has length 33 [2021-07-09 18:04:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:25,562 INFO L482 AbstractCegarLoop]: Abstraction has 10535 states and 47792 transitions. [2021-07-09 18:04:25,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 47792 transitions. [2021-07-09 18:04:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:25,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:25,584 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, 1, 1, 1] [2021-07-09 18:04:25,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-07-09 18:04:25,784 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 171060376, now seen corresponding path program 36 times [2021-07-09 18:04:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:25,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190769049] [2021-07-09 18:04:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:26,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190769049] [2021-07-09 18:04:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190769049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365722536] [2021-07-09 18:04:26,001 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 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 [2021-07-09 18:04:26,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:04:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:26,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:26,250 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 65 [2021-07-09 18:04:26,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:26,361 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-09 18:04:26,361 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.1 percent of original size [2021-07-09 18:04:26,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:26,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:71 [2021-07-09 18:04:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:26,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365722536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:26,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:26,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:04:26,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909492329] [2021-07-09 18:04:26,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:04:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:26,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:04:26,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:04:26,596 INFO L87 Difference]: Start difference. First operand 10535 states and 47792 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:28,777 INFO L93 Difference]: Finished difference Result 11256 states and 50731 transitions. [2021-07-09 18:04:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:04:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:28,811 INFO L225 Difference]: With dead ends: 11256 [2021-07-09 18:04:28,811 INFO L226 Difference]: Without dead ends: 11241 [2021-07-09 18:04:28,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1757.8ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:04:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11241 states. [2021-07-09 18:04:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11241 to 10517. [2021-07-09 18:04:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 10516 states have (on average 4.5375618105743625) internal successors, (47717), 10516 states have internal predecessors, (47717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 47717 transitions. [2021-07-09 18:04:29,030 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 47717 transitions. Word has length 33 [2021-07-09 18:04:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:29,030 INFO L482 AbstractCegarLoop]: Abstraction has 10517 states and 47717 transitions. [2021-07-09 18:04:29,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 47717 transitions. [2021-07-09 18:04:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:29,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:29,050 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, 1, 1, 1] [2021-07-09 18:04:29,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:29,251 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash 534227778, now seen corresponding path program 37 times [2021-07-09 18:04:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:29,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040592740] [2021-07-09 18:04:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:29,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:29,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040592740] [2021-07-09 18:04:29,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040592740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:29,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140071167] [2021-07-09 18:04:29,461 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 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 [2021-07-09 18:04:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:29,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:29,685 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 28 treesize of output 12 [2021-07-09 18:04:29,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:29,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:29,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:29,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2021-07-09 18:04:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:29,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140071167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:29,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:29,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:04:29,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441313840] [2021-07-09 18:04:29,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:04:29,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:29,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:04:29,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:04:29,748 INFO L87 Difference]: Start difference. First operand 10517 states and 47717 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:31,278 INFO L93 Difference]: Finished difference Result 11320 states and 51041 transitions. [2021-07-09 18:04:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:04:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:31,310 INFO L225 Difference]: With dead ends: 11320 [2021-07-09 18:04:31,311 INFO L226 Difference]: Without dead ends: 11305 [2021-07-09 18:04:31,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1211.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:04:31,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11305 states. [2021-07-09 18:04:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11305 to 10517. [2021-07-09 18:04:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 10516 states have (on average 4.5375618105743625) internal successors, (47717), 10516 states have internal predecessors, (47717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 47717 transitions. [2021-07-09 18:04:31,518 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 47717 transitions. Word has length 33 [2021-07-09 18:04:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:31,518 INFO L482 AbstractCegarLoop]: Abstraction has 10517 states and 47717 transitions. [2021-07-09 18:04:31,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 47717 transitions. [2021-07-09 18:04:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:31,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:31,538 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, 1, 1, 1] [2021-07-09 18:04:31,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-09 18:04:31,739 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash 968257124, now seen corresponding path program 38 times [2021-07-09 18:04:31,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:31,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093455919] [2021-07-09 18:04:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:31,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093455919] [2021-07-09 18:04:31,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093455919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199103253] [2021-07-09 18:04:31,970 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 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 [2021-07-09 18:04:32,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:32,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:04:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:32,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:32,208 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 [2021-07-09 18:04:32,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:32,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:32,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:32,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:42 [2021-07-09 18:04:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:32,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199103253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:32,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:32,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:04:32,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393269162] [2021-07-09 18:04:32,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:04:32,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:04:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:32,380 INFO L87 Difference]: Start difference. First operand 10517 states and 47717 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:33,571 INFO L93 Difference]: Finished difference Result 11108 states and 50071 transitions. [2021-07-09 18:04:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:04:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:33,607 INFO L225 Difference]: With dead ends: 11108 [2021-07-09 18:04:33,607 INFO L226 Difference]: Without dead ends: 11093 [2021-07-09 18:04:33,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 991.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:04:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11093 states. [2021-07-09 18:04:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11093 to 10493. [2021-07-09 18:04:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10493 states, 10492 states have (on average 4.537933663743805) internal successors, (47612), 10492 states have internal predecessors, (47612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 47612 transitions. [2021-07-09 18:04:33,909 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 47612 transitions. Word has length 33 [2021-07-09 18:04:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:33,909 INFO L482 AbstractCegarLoop]: Abstraction has 10493 states and 47612 transitions. [2021-07-09 18:04:33,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 47612 transitions. [2021-07-09 18:04:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:33,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:33,930 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, 1, 1, 1] [2021-07-09 18:04:34,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-09 18:04:34,130 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1134233474, now seen corresponding path program 39 times [2021-07-09 18:04:34,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:34,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870551467] [2021-07-09 18:04:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:34,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:34,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870551467] [2021-07-09 18:04:34,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870551467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:34,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142972460] [2021-07-09 18:04:34,366 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 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 [2021-07-09 18:04:34,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:04:34,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:34,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:04:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:34,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:34,535 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 [2021-07-09 18:04:34,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:34,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:34,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:34,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-07-09 18:04:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142972460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:34,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:34,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:04:34,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800673431] [2021-07-09 18:04:34,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:04:34,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:04:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:04:34,709 INFO L87 Difference]: Start difference. First operand 10493 states and 47612 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:36,017 INFO L93 Difference]: Finished difference Result 11283 states and 50803 transitions. [2021-07-09 18:04:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:04:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:36,050 INFO L225 Difference]: With dead ends: 11283 [2021-07-09 18:04:36,051 INFO L226 Difference]: Without dead ends: 11264 [2021-07-09 18:04:36,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:04:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2021-07-09 18:04:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 10594. [2021-07-09 18:04:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10594 states, 10593 states have (on average 4.537430378551874) internal successors, (48065), 10593 states have internal predecessors, (48065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10594 states to 10594 states and 48065 transitions. [2021-07-09 18:04:36,270 INFO L78 Accepts]: Start accepts. Automaton has 10594 states and 48065 transitions. Word has length 33 [2021-07-09 18:04:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:36,270 INFO L482 AbstractCegarLoop]: Abstraction has 10594 states and 48065 transitions. [2021-07-09 18:04:36,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10594 states and 48065 transitions. [2021-07-09 18:04:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:36,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:36,290 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, 1, 1, 1] [2021-07-09 18:04:36,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-07-09 18:04:36,490 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1738378996, now seen corresponding path program 40 times [2021-07-09 18:04:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:36,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614239255] [2021-07-09 18:04:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:36,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614239255] [2021-07-09 18:04:36,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614239255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852372713] [2021-07-09 18:04:36,722 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 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 [2021-07-09 18:04:36,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:36,886 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 [2021-07-09 18:04:36,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:36,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:36,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:36,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:04:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852372713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:36,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:36,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:04:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623303248] [2021-07-09 18:04:36,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:04:36,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:04:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:04:36,981 INFO L87 Difference]: Start difference. First operand 10594 states and 48065 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:38,198 INFO L93 Difference]: Finished difference Result 11924 states and 53212 transitions. [2021-07-09 18:04:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:04:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:38,234 INFO L225 Difference]: With dead ends: 11924 [2021-07-09 18:04:38,234 INFO L226 Difference]: Without dead ends: 11900 [2021-07-09 18:04:38,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:04:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11900 states. [2021-07-09 18:04:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11900 to 10615. [2021-07-09 18:04:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 4.53815715093273) internal successors, (48168), 10614 states have internal predecessors, (48168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 48168 transitions. [2021-07-09 18:04:38,476 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 48168 transitions. Word has length 33 [2021-07-09 18:04:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:38,476 INFO L482 AbstractCegarLoop]: Abstraction has 10615 states and 48168 transitions. [2021-07-09 18:04:38,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 48168 transitions. [2021-07-09 18:04:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:38,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:38,498 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, 1, 1, 1] [2021-07-09 18:04:38,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:38,698 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash 888194858, now seen corresponding path program 41 times [2021-07-09 18:04:38,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:38,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877502422] [2021-07-09 18:04:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:38,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877502422] [2021-07-09 18:04:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877502422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227167260] [2021-07-09 18:04:38,937 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 [2021-07-09 18:04:38,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:04:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:38,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:39,090 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 [2021-07-09 18:04:39,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:39,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:39,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:39,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-07-09 18:04:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227167260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:39,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:39,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:04:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011067988] [2021-07-09 18:04:39,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:04:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:04:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:39,182 INFO L87 Difference]: Start difference. First operand 10615 states and 48168 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:40,461 INFO L93 Difference]: Finished difference Result 11896 states and 53145 transitions. [2021-07-09 18:04:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:04:40,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:40,496 INFO L225 Difference]: With dead ends: 11896 [2021-07-09 18:04:40,496 INFO L226 Difference]: Without dead ends: 11859 [2021-07-09 18:04:40,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1142.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:04:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11859 states. [2021-07-09 18:04:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11859 to 10559. [2021-07-09 18:04:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10559 states, 10558 states have (on average 4.539496116688767) internal successors, (47928), 10558 states have internal predecessors, (47928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10559 states to 10559 states and 47928 transitions. [2021-07-09 18:04:40,762 INFO L78 Accepts]: Start accepts. Automaton has 10559 states and 47928 transitions. Word has length 33 [2021-07-09 18:04:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:40,762 INFO L482 AbstractCegarLoop]: Abstraction has 10559 states and 47928 transitions. [2021-07-09 18:04:40,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:40,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10559 states and 47928 transitions. [2021-07-09 18:04:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:40,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:40,783 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, 1, 1, 1] [2021-07-09 18:04:40,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:40,983 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:40,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1699500772, now seen corresponding path program 42 times [2021-07-09 18:04:40,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:40,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858735832] [2021-07-09 18:04:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:41,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:41,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858735832] [2021-07-09 18:04:41,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858735832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:41,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447038483] [2021-07-09 18:04:41,216 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 [2021-07-09 18:04:41,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:41,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:41,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:41,424 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:04:41,424 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-07-09 18:04:41,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:41,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:41,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:41,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-07-09 18:04:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:41,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447038483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:41,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:41,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:04:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702462610] [2021-07-09 18:04:41,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:04:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:04:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:04:41,662 INFO L87 Difference]: Start difference. First operand 10559 states and 47928 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:43,518 INFO L93 Difference]: Finished difference Result 11079 states and 50046 transitions. [2021-07-09 18:04:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:04:43,518 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:43,550 INFO L225 Difference]: With dead ends: 11079 [2021-07-09 18:04:43,550 INFO L226 Difference]: Without dead ends: 11064 [2021-07-09 18:04:43,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1561.6ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:04:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11064 states. [2021-07-09 18:04:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11064 to 10538. [2021-07-09 18:04:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10538 states, 10537 states have (on average 4.540476416437316) internal successors, (47843), 10537 states have internal predecessors, (47843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10538 states to 10538 states and 47843 transitions. [2021-07-09 18:04:43,823 INFO L78 Accepts]: Start accepts. Automaton has 10538 states and 47843 transitions. Word has length 33 [2021-07-09 18:04:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:43,823 INFO L482 AbstractCegarLoop]: Abstraction has 10538 states and 47843 transitions. [2021-07-09 18:04:43,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 10538 states and 47843 transitions. [2021-07-09 18:04:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:43,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:43,843 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, 1, 1, 1] [2021-07-09 18:04:44,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:44,044 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:44,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1231415870, now seen corresponding path program 43 times [2021-07-09 18:04:44,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:44,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386573375] [2021-07-09 18:04:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:44,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:44,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386573375] [2021-07-09 18:04:44,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386573375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:44,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247811102] [2021-07-09 18:04:44,285 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 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 [2021-07-09 18:04:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:44,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:44,442 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 29 treesize of output 13 [2021-07-09 18:04:44,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:44,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:44,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:44,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:04:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:44,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247811102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:44,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:44,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:04:44,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676219133] [2021-07-09 18:04:44,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:04:44,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:44,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:04:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:44,536 INFO L87 Difference]: Start difference. First operand 10538 states and 47843 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:46,423 INFO L93 Difference]: Finished difference Result 12532 states and 55693 transitions. [2021-07-09 18:04:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:04:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:46,461 INFO L225 Difference]: With dead ends: 12532 [2021-07-09 18:04:46,462 INFO L226 Difference]: Without dead ends: 12494 [2021-07-09 18:04:46,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1679.3ms TimeCoverageRelationStatistics Valid=472, Invalid=2834, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:04:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12494 states. [2021-07-09 18:04:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12494 to 10767. [2021-07-09 18:04:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10767 states, 10766 states have (on average 4.540033438603009) internal successors, (48878), 10766 states have internal predecessors, (48878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10767 states to 10767 states and 48878 transitions. [2021-07-09 18:04:46,704 INFO L78 Accepts]: Start accepts. Automaton has 10767 states and 48878 transitions. Word has length 33 [2021-07-09 18:04:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:46,704 INFO L482 AbstractCegarLoop]: Abstraction has 10767 states and 48878 transitions. [2021-07-09 18:04:46,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10767 states and 48878 transitions. [2021-07-09 18:04:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:46,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:46,724 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, 1, 1, 1] [2021-07-09 18:04:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-09 18:04:46,925 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1641196600, now seen corresponding path program 44 times [2021-07-09 18:04:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110791713] [2021-07-09 18:04:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:47,153 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-07-09 18:04:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:47,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:47,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110791713] [2021-07-09 18:04:47,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110791713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:47,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427744161] [2021-07-09 18:04:47,241 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 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 [2021-07-09 18:04:47,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:47,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:47,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:47,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:04:47,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:47,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:47,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:47,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-07-09 18:04:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:47,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427744161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:47,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:47,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:04:47,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96202763] [2021-07-09 18:04:47,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:04:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:04:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:47,611 INFO L87 Difference]: Start difference. First operand 10767 states and 48878 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:49,391 INFO L93 Difference]: Finished difference Result 12016 states and 53510 transitions. [2021-07-09 18:04:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:04:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:49,426 INFO L225 Difference]: With dead ends: 12016 [2021-07-09 18:04:49,427 INFO L226 Difference]: Without dead ends: 11994 [2021-07-09 18:04:49,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1777.4ms TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:04:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11994 states. [2021-07-09 18:04:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11994 to 10804. [2021-07-09 18:04:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10804 states, 10803 states have (on average 4.539109506618532) internal successors, (49036), 10803 states have internal predecessors, (49036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10804 states to 10804 states and 49036 transitions. [2021-07-09 18:04:49,671 INFO L78 Accepts]: Start accepts. Automaton has 10804 states and 49036 transitions. Word has length 33 [2021-07-09 18:04:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:49,671 INFO L482 AbstractCegarLoop]: Abstraction has 10804 states and 49036 transitions. [2021-07-09 18:04:49,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 10804 states and 49036 transitions. [2021-07-09 18:04:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:49,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:49,693 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, 1, 1, 1] [2021-07-09 18:04:49,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-09 18:04:49,893 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2086298620, now seen corresponding path program 45 times [2021-07-09 18:04:49,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:49,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549991033] [2021-07-09 18:04:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:50,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:50,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549991033] [2021-07-09 18:04:50,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549991033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:50,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135423893] [2021-07-09 18:04:50,134 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 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 [2021-07-09 18:04:50,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:04:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:50,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:50,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:50,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:04:50,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:50,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:50,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:50,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-07-09 18:04:50,490 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-09 18:04:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:50,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135423893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:50,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:50,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:04:50,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282723982] [2021-07-09 18:04:50,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:04:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:50,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:04:50,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:50,638 INFO L87 Difference]: Start difference. First operand 10804 states and 49036 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:50,836 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-07-09 18:04:51,065 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-09 18:04:51,380 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 18:04:52,683 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 18:04:52,837 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-07-09 18:04:52,975 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-09 18:04:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:52,984 INFO L93 Difference]: Finished difference Result 11633 states and 52265 transitions. [2021-07-09 18:04:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:04:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:53,018 INFO L225 Difference]: With dead ends: 11633 [2021-07-09 18:04:53,019 INFO L226 Difference]: Without dead ends: 11618 [2021-07-09 18:04:53,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 2325.6ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:04:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11618 states. [2021-07-09 18:04:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11618 to 10804. [2021-07-09 18:04:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10804 states, 10803 states have (on average 4.539109506618532) internal successors, (49036), 10803 states have internal predecessors, (49036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10804 states to 10804 states and 49036 transitions. [2021-07-09 18:04:53,240 INFO L78 Accepts]: Start accepts. Automaton has 10804 states and 49036 transitions. Word has length 33 [2021-07-09 18:04:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:53,240 INFO L482 AbstractCegarLoop]: Abstraction has 10804 states and 49036 transitions. [2021-07-09 18:04:53,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 10804 states and 49036 transitions. [2021-07-09 18:04:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:53,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:53,261 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, 1, 1, 1] [2021-07-09 18:04:53,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-07-09 18:04:53,462 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash 428070374, now seen corresponding path program 46 times [2021-07-09 18:04:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612443233] [2021-07-09 18:04:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:53,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:53,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612443233] [2021-07-09 18:04:53,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612443233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:53,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594446716] [2021-07-09 18:04:53,697 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 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 [2021-07-09 18:04:53,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:53,851 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 29 treesize of output 13 [2021-07-09 18:04:53,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:53,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:53,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:53,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:04:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:53,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594446716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:53,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:53,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:04:53,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068494649] [2021-07-09 18:04:53,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:04:53,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:53,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:04:53,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:04:53,948 INFO L87 Difference]: Start difference. First operand 10804 states and 49036 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:55,503 INFO L93 Difference]: Finished difference Result 12285 states and 54706 transitions. [2021-07-09 18:04:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:04:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:55,541 INFO L225 Difference]: With dead ends: 12285 [2021-07-09 18:04:55,541 INFO L226 Difference]: Without dead ends: 12251 [2021-07-09 18:04:55,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1337.5ms TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:04:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12251 states. [2021-07-09 18:04:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12251 to 10748. [2021-07-09 18:04:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10748 states, 10747 states have (on average 4.541267330417791) internal successors, (48805), 10747 states have internal predecessors, (48805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10748 states to 10748 states and 48805 transitions. [2021-07-09 18:04:55,773 INFO L78 Accepts]: Start accepts. Automaton has 10748 states and 48805 transitions. Word has length 33 [2021-07-09 18:04:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:55,773 INFO L482 AbstractCegarLoop]: Abstraction has 10748 states and 48805 transitions. [2021-07-09 18:04:55,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 10748 states and 48805 transitions. [2021-07-09 18:04:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:55,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:55,795 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, 1, 1, 1] [2021-07-09 18:04:55,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:55,995 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:55,995 INFO L82 PathProgramCache]: Analyzing trace with hash 53715198, now seen corresponding path program 47 times [2021-07-09 18:04:55,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:55,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726194592] [2021-07-09 18:04:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:56,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:56,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726194592] [2021-07-09 18:04:56,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726194592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:56,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743319565] [2021-07-09 18:04:56,238 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 [2021-07-09 18:04:56,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:04:56,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:56,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:56,406 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 29 treesize of output 13 [2021-07-09 18:04:56,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:56,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:56,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:56,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-07-09 18:04:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:56,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743319565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:56,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:56,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:04:56,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112947621] [2021-07-09 18:04:56,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:04:56,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:04:56,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:56,507 INFO L87 Difference]: Start difference. First operand 10748 states and 48805 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:57,848 INFO L93 Difference]: Finished difference Result 11563 states and 52036 transitions. [2021-07-09 18:04:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:04:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:57,882 INFO L225 Difference]: With dead ends: 11563 [2021-07-09 18:04:57,882 INFO L226 Difference]: Without dead ends: 11544 [2021-07-09 18:04:57,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:04:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2021-07-09 18:04:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10736. [2021-07-09 18:04:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10736 states, 10735 states have (on average 4.5424312994876574) internal successors, (48763), 10735 states have internal predecessors, (48763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10736 states to 10736 states and 48763 transitions. [2021-07-09 18:04:58,102 INFO L78 Accepts]: Start accepts. Automaton has 10736 states and 48763 transitions. Word has length 33 [2021-07-09 18:04:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:58,102 INFO L482 AbstractCegarLoop]: Abstraction has 10736 states and 48763 transitions. [2021-07-09 18:04:58,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10736 states and 48763 transitions. [2021-07-09 18:04:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:58,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:58,123 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, 1, 1, 1] [2021-07-09 18:04:58,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:58,324 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1774622960, now seen corresponding path program 48 times [2021-07-09 18:04:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:58,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383465617] [2021-07-09 18:04:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:58,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383465617] [2021-07-09 18:04:58,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383465617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:58,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696022934] [2021-07-09 18:04:58,529 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 [2021-07-09 18:04:58,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:58,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:58,749 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-07-09 18:04:58,749 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 27 treesize of output 55 [2021-07-09 18:04:58,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:04:58,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:58,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:58,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-07-09 18:04:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696022934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:58,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:58,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:04:58,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498791336] [2021-07-09 18:04:58,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:04:58,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:04:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:58,888 INFO L87 Difference]: Start difference. First operand 10736 states and 48763 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:00,753 INFO L93 Difference]: Finished difference Result 12061 states and 54184 transitions. [2021-07-09 18:05:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:05:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:00,792 INFO L225 Difference]: With dead ends: 12061 [2021-07-09 18:05:00,793 INFO L226 Difference]: Without dead ends: 12039 [2021-07-09 18:05:00,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1459.0ms TimeCoverageRelationStatistics Valid=346, Invalid=2624, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:05:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12039 states. [2021-07-09 18:05:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12039 to 10777. [2021-07-09 18:05:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10777 states, 10776 states have (on average 4.542316258351893) internal successors, (48948), 10776 states have internal predecessors, (48948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10777 states to 10777 states and 48948 transitions. [2021-07-09 18:05:01,088 INFO L78 Accepts]: Start accepts. Automaton has 10777 states and 48948 transitions. Word has length 33 [2021-07-09 18:05:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:01,088 INFO L482 AbstractCegarLoop]: Abstraction has 10777 states and 48948 transitions. [2021-07-09 18:05:01,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10777 states and 48948 transitions. [2021-07-09 18:05:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:01,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:01,110 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, 1, 1, 1] [2021-07-09 18:05:01,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:01,311 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:01,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1543091530, now seen corresponding path program 49 times [2021-07-09 18:05:01,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:01,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983670438] [2021-07-09 18:05:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:01,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983670438] [2021-07-09 18:05:01,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983670438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380261801] [2021-07-09 18:05:01,514 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 [2021-07-09 18:05:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:05:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:01,691 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 28 treesize of output 12 [2021-07-09 18:05:01,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:01,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:01,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:01,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-07-09 18:05:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380261801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:01,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:05:01,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830243599] [2021-07-09 18:05:01,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:05:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:01,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:05:01,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:05:01,772 INFO L87 Difference]: Start difference. First operand 10777 states and 48948 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:03,381 INFO L93 Difference]: Finished difference Result 13172 states and 58458 transitions. [2021-07-09 18:05:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:05:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:03,422 INFO L225 Difference]: With dead ends: 13172 [2021-07-09 18:05:03,422 INFO L226 Difference]: Without dead ends: 13142 [2021-07-09 18:05:03,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1307.8ms TimeCoverageRelationStatistics Valid=404, Invalid=2566, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:05:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13142 states. [2021-07-09 18:05:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13142 to 10949. [2021-07-09 18:05:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10949 states, 10948 states have (on average 4.545853123858239) internal successors, (49768), 10948 states have internal predecessors, (49768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10949 states to 10949 states and 49768 transitions. [2021-07-09 18:05:03,694 INFO L78 Accepts]: Start accepts. Automaton has 10949 states and 49768 transitions. Word has length 33 [2021-07-09 18:05:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:03,694 INFO L482 AbstractCegarLoop]: Abstraction has 10949 states and 49768 transitions. [2021-07-09 18:05:03,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10949 states and 49768 transitions. [2021-07-09 18:05:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:03,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:03,716 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, 1, 1, 1] [2021-07-09 18:05:03,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-07-09 18:05:03,921 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash -697115978, now seen corresponding path program 50 times [2021-07-09 18:05:03,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:03,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930338873] [2021-07-09 18:05:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:04,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930338873] [2021-07-09 18:05:04,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930338873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:04,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545921738] [2021-07-09 18:05:04,108 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 [2021-07-09 18:05:04,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:04,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:04,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:05:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:04,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:04,364 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 24 treesize of output 30 [2021-07-09 18:05:04,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:04,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:04,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:04,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-09 18:05:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:04,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545921738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:04,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:04,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 18:05:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217309967] [2021-07-09 18:05:04,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:05:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:05:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:05:04,508 INFO L87 Difference]: Start difference. First operand 10949 states and 49768 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:05:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:05:05,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:05,362 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:05:05,362 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (3/3) [2021-07-09 18:05:05,363 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:05:05,365 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:05:05,365 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:05:05 BasicIcfg [2021-07-09 18:05:05,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:05:05,365 INFO L168 Benchmark]: Toolchain (without parser) took 801324.16 ms. Allocated memory was 184.5 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 165.4 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 536.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:05:05,365 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 184.5 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:05:05,365 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 184.5 MB. Free memory was 165.3 MB in the beginning and 163.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:05:05,365 INFO L168 Benchmark]: Boogie Preprocessor took 11.42 ms. Allocated memory is still 184.5 MB. Free memory was 163.9 MB in the beginning and 162.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:05:05,365 INFO L168 Benchmark]: RCFGBuilder took 261.06 ms. Allocated memory is still 184.5 MB. Free memory was 162.7 MB in the beginning and 145.8 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:05:05,365 INFO L168 Benchmark]: TraceAbstraction took 801013.19 ms. Allocated memory was 184.5 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 145.4 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 516.2 MB. Max. memory is 8.0 GB. [2021-07-09 18:05:05,366 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 184.5 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 184.5 MB. Free memory was 165.3 MB in the beginning and 163.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.42 ms. Allocated memory is still 184.5 MB. Free memory was 163.9 MB in the beginning and 162.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 261.06 ms. Allocated memory is still 184.5 MB. Free memory was 162.7 MB in the beginning and 145.8 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 801013.19 ms. Allocated memory was 184.5 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 145.4 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 516.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10949states) and FLOYD_HOARE automaton (currently 18 states, 24 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 37 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork4 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 55.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 10.1ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred 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: thread1Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 1.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred 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, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 800742.8ms, OverallIterations: 381, TraceHistogramMax: 2, EmptinessCheckTime: 5451.3ms, AutomataDifference: 491173.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47647 SDtfs, 163699 SDslu, 598802 SDs, 0 SdLazy, 383408 SolverSat, 27730 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143046.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23793 GetRequests, 8058 SyntacticMatches, 817 SemanticMatches, 14917 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171136 ImplicationChecksByTransitivity, 394052.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10949occurred in iteration=380, InterpolantAutomatonStates: 12169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58644.6ms AutomataMinimizationTime, 380 MinimizatonAttempts, 328956 StatesRemovedByMinimization, 380 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2361.1ms SsaConstructionTime, 5351.3ms SatisfiabilityAnalysisTime, 152439.9ms InterpolantComputationTime, 24105 NumberOfCodeBlocks, 24105 NumberOfCodeBlocksAsserted, 1257 NumberOfCheckSat, 23346 ConstructedInterpolants, 11 QuantifiedInterpolants, 418889 SizeOfPredicates, 4775 NumberOfNonLiveVariables, 52066 ConjunctsInSsa, 13903 ConjunctsInUnsatCore, 759 InterpolantComputations, 5 PerfectInterpolantSequences, 43/4449 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